Rakuten Kobo

Shopping Cart

Item(s) unavailable for purchase

Please review your cart. You can remove the unavailable item(s) now or we'll automatically remove it at Checkout.

itemsitem

- Unlimited access to eBooks
  
  Unlimited access to audiobooks
  
  No commitment, cancel anytime at kobo.com/account/subscriptions
  
  Get 1 credit every month for the audiobook of your choice
  
  No commitment, cancel anytime at kobo.com/account/subscriptions
  
  Unlimited access to eBooks
  
  Unlimited access to audiobooks
  
  No commitment, cancel anytime at kobo.com/account/subscriptions
  Audiobook
  by ,
  
  Available:
  
  . No commitment, cancel anytime at kobo.com/account/subscriptions.
  
  Pre-order
  1 audiobook monthly
  
  + FREE 30-day trial
  
  Special Offer
  
  Get 1 credit every month to exchange for an audiobook of your choice
  
  *No commitment, cancel anytime
  
  FREE

itemsitem

Unlimited access to eBooks

Unlimited access to audiobooks

No commitment, cancel anytime at kobo.com/account/subscriptions

Get 1 credit every month for the audiobook of your choice

No commitment, cancel anytime at kobo.com/account/subscriptions

Unlimited access to eBooks

Unlimited access to audiobooks

No commitment, cancel anytime at kobo.com/account/subscriptions
Audiobook
by ,

Available:
. No commitment, cancel anytime at kobo.com/account/subscriptions.

Pre-order
1 audiobook monthly

+ FREE 30-day trial

Special Offer

Get 1 credit every month to exchange for an audiobook of your choice

*No commitment, cancel anytime

FREE

Recommended For You

Audiobook

A Short History of Nearly Everything

The bestselling popular science book of the 21st Century

by Bill Bryson ...

Narrated by Bill Bryson ...

Series Audiobook 5 - Bryson
Abridged

5 hours 47 min

Brought to you by Penguin.Featuring a special introduction written for the audiobook edition and read by the authorA Radio 4 Book Club Selection.The ultimate eye-opening journey through time and space, A Short History of Nearly Everything is the biggest-selling popular science book of the 21st century and has sold over 2 million copies.Bill Bryson describes himself as a reluctant tr... ... Read more

R303,51

Brought to you by Penguin.Featuring a special introduction written for the audiobook edition and read by the authorA Radio 4 Book Club Selection.The ultimate eye-opening journey through time and space, A Short History of Nearly Everything is the biggest-selling popular science book of the 21st century and has sold over 2 million copies.Bill Bryson describes himself as a reluctant tr...
... Read more
Audiobook

Becoming Supernatural: How Common People Are Doing The Uncommon

by Dr. Joe Dispenza ...

Narrated by Adam Boyce ...

Unabridged

14 hours 6 min

The author of the New York Times bestseller You Are the Placebo, as well as Breaking the Habit of Being Yourself and Evolve Your Brain, draws on research conducted at his advanced workshops since 2012 to explore how common people are doing the uncommon to transform themselves and their lives. Becoming Supernatural marries the some of the most profound scientific information with ancient wisdom to ... Read more

R584,53 or Free with Kobo Plus

The author of the New York Times bestseller You Are the Placebo, as well as Breaking the Habit of Being Yourself and Evolve Your Brain, draws on research conducted at his advanced workshops since 2012 to explore how common people are doing the uncommon to transform themselves and their lives. Becoming Supernatural marries the some of the most profound scientific information with ancient wisdom to
... Read more
Audiobook

Four Thousand Weeks

Embrace your limits. Change your life. Make your four thousand weeks count.

by Oliver Burkeman ...

Narrated by Oliver Burkeman ...

Unabridged

5 hours 54 min

What if you tried to stop doing everything, so you could finally get round to what counts?**The Instant Sunday Times bestseller**Rejecting the futile modern obsession with 'getting everything done,' Four Thousand Weeks introduces readers to tools for constructing a meaningful life by embracing rather than denying their limitations.Drawing on the insights of both ancient and contemporary ... Read more

R281,83

What if you tried to stop doing everything, so you could finally get round to what counts?**The Instant Sunday Times bestseller**Rejecting the futile modern obsession with 'getting everything done,' Four Thousand Weeks introduces readers to tools for constructing a meaningful life by embracing rather than denying their limitations.Drawing on the insights of both ancient and contemporary
... Read more
Audiobook

A Brief History Of Time

From Big Bang To Black Holes

by Stephen Hawking ...

Narrated by John Sackville ...

Unabridged

7 hours 18 min

Brought to you by Penguin.Was there a beginning of time? Could time run backwards? Is the universe infinite or does it have boundaries?These are just some of the questions considered in the internationally acclaimed masterpiece by the world renowned physicist - generally considered to have been one of the world's greatest thinkers.It begins by reviewing the great theories of the cosmos from Newton ... Read more

R260,15

Brought to you by Penguin.Was there a beginning of time? Could time run backwards? Is the universe infinite or does it have boundaries?These are just some of the questions considered in the internationally acclaimed masterpiece by the world renowned physicist - generally considered to have been one of the world's greatest thinkers.It begins by reviewing the great theories of the cosmos from Newton
... Read more
Audiobook

Cosmos

A Personal Voyage

by Carl Sagan ...

Narrated by LeVar Burton, Seth MacFarlane, Ann Druyan, Neil deGrasse Tyson ...

Unabridged

14 hours 31 min

RETURNING TO TELEVISION AS AN ALL-NEW MINISERIES ON FOXCosmos is one of the bestselling science books of all time. In clear-eyed prose, Sagan reveals a jewel-like blue world inhabited by a life form that is just beginning to discover its own identity and to venture into the vast ocean of space. Cosmos retraces the fourteen billion years of cosmic evolution that have transformed matter into ... Read more

R785,23

RETURNING TO TELEVISION AS AN ALL-NEW MINISERIES ON FOXCosmos is one of the bestselling science books of all time. In clear-eyed prose, Sagan reveals a jewel-like blue world inhabited by a life form that is just beginning to discover its own identity and to venture into the vast ocean of space. Cosmos retraces the fourteen billion years of cosmic evolution that have transformed matter into
... Read more
Audiobook

Brief Answers to the Big Questions

'A beautiful little book by a brilliant mind' DAILY TELEGRAPH

by Stephen Hawking ...

Narrated by Ben Whishaw, Garrick Hagon, Lucy Hawking ...

Unabridged

4 hours 52 min

Read by Ben Whishaw and Garrick Hagon, with an afterword read by Lucy Hawking.The world-famous cosmologist and #1 bestselling author of A Brief History of Time leaves us with his final thoughts on the universe's biggest questions in this brilliant posthumous work.How did the universe begin? Will humanity survive on Earth? Is there intelligent life beyond our solar system? Could artificial ... Read more

R584,31

Read by Ben Whishaw and Garrick Hagon, with an afterword read by Lucy Hawking.The world-famous cosmologist and #1 bestselling author of A Brief History of Time leaves us with his final thoughts on the universe's biggest questions in this brilliant posthumous work.How did the universe begin? Will humanity survive on Earth? Is there intelligent life beyond our solar system? Could artificial
... Read more
Audiobook

Физика с Эйнштейном. Ключевые идеи в популярном изложении

by Рюдигер Ваас ...

Narrated by Магомед Джамаладинов ...

Series series Научпоп для начинающих
Unabridged

5 hours 12 min

Простое и остроумное повествование о жизни Альберта Эйнштейна, его основных научных открытиях и концепциях — от первых озарений до величайших открытий. Вы узнаете, как скромный патентный клерк совершил революцию в науке, подарив миру теорию относительности и знаменитую формулу E=mc², раскрывающую тайну энергии звёзд. Позитивные иллюстрации отлично помогают разобраться в идеях о пространстве ... Read more

R79,00 or Free with Kobo Plus

Простое и остроумное повествование о жизни Альберта Эйнштейна, его основных научных открытиях и концепциях — от первых озарений до величайших открытий. Вы узнаете, как скромный патентный клерк совершил революцию в науке, подарив миру теорию относительности и знаменитую формулу E=mc², раскрывающую тайну энергии звёзд. Позитивные иллюстрации отлично помогают разобраться в идеях о пространстве
... Read more
Audiobook

Spaceflight

The Complete Story from Sputnik to Curiosity

by Giles Sparrow ...

Narrated by Emma Hignett ...

Series series DK Definitive Visual Histories
Unabridged

16 hours 56 min

Follow the compelling epic story of mankind's exploration of the final frontier with a foreword by Buzz Aldrin.This compelling story of exploration charts and celebrates humankind in space, from Sputnik's launch in 1957 through the Apollo Moon landings and the International Space Station to future missions to Mars and beyond.Spaceflight chronicles how, in the six decades that followed Sputnik, the ... Read more

R346,87

Follow the compelling epic story of mankind's exploration of the final frontier with a foreword by Buzz Aldrin.This compelling story of exploration charts and celebrates humankind in space, from Sputnik's launch in 1957 through the Apollo Moon landings and the International Space Station to future missions to Mars and beyond.Spaceflight chronicles how, in the six decades that followed Sputnik, the
... Read more
Audiobook

Historiqwo Numéro Un - Géocentrisme Et Héliocentrisme

Une petite histoire des deux grands systèmes du monde !

by Djeh ...

Series Audiobook 1 - Historiqwo
Unabridged

24 min

Depuis les temps les plus reculés, les Hommes de tous les peuples ont levé leurs yeux vers le ciel... Comment cet univers est-il organisé ? A la fantaisie des premiers temps, succèdent la logique et la réflexion... Voici contée une histoire des deux grands modèles qui vont s'affronter, Ptolémée contre Copernic ! ... Read more

R9,99 or Free with Kobo Plus

Depuis les temps les plus reculés, les Hommes de tous les peuples ont levé leurs yeux vers le ciel... Comment cet univers est-il organisé ? A la fantaisie des premiers temps, succèdent la logique et la réflexion... Voici contée une histoire des deux grands modèles qui vont s'affronter, Ptolémée contre Copernic !
... Read more
Audiobook

Quantum Curiosities: A Journey Into the Heart of the Quantum World

by M.S. Ali ...

Narrated by Digital Voice Madison G ...

Series series Celestial Wonders
Unabridged

2 hours 59 min

This audiobook is narrated by a digital voice.Have you ever wondered if reality is truly as it seems? Or pondered the mysteries hidden beneath the surface of the everyday? Prepare to have your perceptions shattered and your intellect ignited as this book, a collaborative tapestry woven with the threads of human curiosity and Artificial Intelligence, guides you through the labyrinthine world of ... Read more

R54,80 or Free with Kobo Plus

This audiobook is narrated by a digital voice.Have you ever wondered if reality is truly as it seems? Or pondered the mysteries hidden beneath the surface of the everyday? Prepare to have your perceptions shattered and your intellect ignited as this book, a collaborative tapestry woven with the threads of human curiosity and Artificial Intelligence, guides you through the labyrinthine world of
... Read more
Audiobook

Comment se Préparer pour Partir dans l'Espace

Connecter le Monde et Au-Delà

by Eric Giegelmann ...

Narrated by Voix Numérique Fabien G ...

Unabridged

11 hours 2 min

Ce livre audio est narré par une voix numérique.L’exploration spatiale est bien plus qu’un simple voyage au-delà de notre planète. Elle est un défi technologique, une aventure humaine et une quête de sens qui nous pousse à repousser nos propres limites. À travers ce livre, nous avons exploré les multiples facettes de la préparation nécessaire pour partir dans l’espace : la rigueur physique, l ... Read more

R235,62 or Free with Kobo Plus

Ce livre audio est narré par une voix numérique.L’exploration spatiale est bien plus qu’un simple voyage au-delà de notre planète. Elle est un défi technologique, une aventure humaine et une quête de sens qui nous pousse à repousser nos propres limites. À travers ce livre, nous avons exploré les multiples facettes de la préparation nécessaire pour partir dans l’espace : la rigueur physique, l
... Read more
Audiobook

Asteroidenbergbau: Der Goldrausch der Zukunft

by Ciro Irmici ...

Narrated by Digitale Stimme Georg G ...

Unabridged

2 hours 3 min

Dieses Hörbuch wird von einer digitalen Stimme vorgelesen.Asteroidenbergbau: Der Goldrausch der Zukunft nimmt dich mit auf eine spannende Reise in die nächste große Grenze der menschlichen Erforschung – den Weltraum.Während die Ressourcen unseres Planeten schwinden und die Weltraumforschung voranschreitet, bieten Asteroiden enorme Mengen an wertvollen Metallen, Mineralien und Wasser. Doch die ... Read more

R72,88 or Free with Kobo Plus

Dieses Hörbuch wird von einer digitalen Stimme vorgelesen.Asteroidenbergbau: Der Goldrausch der Zukunft nimmt dich mit auf eine spannende Reise in die nächste große Grenze der menschlichen Erforschung – den Weltraum.Während die Ressourcen unseres Planeten schwinden und die Weltraumforschung voranschreitet, bieten Asteroiden enorme Mengen an wertvollen Metallen, Mineralien und Wasser. Doch die
... Read more
Audiobook

Quantum

A Guide For The Perplexed

by Jim Al-Khalili ...

Narrated by Hugh Kermode ...

Unabridged

7 hours 51 min

From Schrodinger's cat to Heisenberg's uncertainty principle, this book untangles the weirdness of the quantum world.Quantum mechanics underpins modern science and provides us with a blueprint for reality itself. And yet it has been said that if you're not shocked by it, you don't understand it. But is quantum physics really so unknowable? Is reality really so strange? And just how can cats be ... Read more

R456,45

From Schrodinger's cat to Heisenberg's uncertainty principle, this book untangles the weirdness of the quantum world.Quantum mechanics underpins modern science and provides us with a blueprint for reality itself. And yet it has been said that if you're not shocked by it, you don't understand it. But is quantum physics really so unknowable? Is reality really so strange? And just how can cats be
... Read more
Audiobook

Quantum Mechanics

by Introbooks Team ...

Narrated by Andrea Giordani ...

Unabridged

40 min

Quantum mechanics? Just hearing the name, we get sick. It seems to be something complicated (and is), but here I will try to explain this theory in simple terms. However, this does not mean that you will go to understand quantum mechanics. As Niels Bohr said, "who says he understands quantum mechanics, you have not understood it." Does it look like something strange, doesn't it? Yes so. Quantum ... Read more

R72,88 or Free with Kobo Plus

Quantum mechanics? Just hearing the name, we get sick. It seems to be something complicated (and is), but here I will try to explain this theory in simple terms. However, this does not mean that you will go to understand quantum mechanics. As Niels Bohr said, "who says he understands quantum mechanics, you have not understood it." Does it look like something strange, doesn't it? Yes so. Quantum
... Read more
Audiobook

In Light-Years There's No Hurry

Cosmic Perspectives on Everyday Life

by Marjolijn van Heemstra ...

Narrated by Mounya Dahma ...

Unabridged

4 hours 23 min

**A New Scientist Best Popular Science Book of 2023How seeing Earth through the eyes of an astronaut brings new wonder and meaning to life on our planet.**One stifling summer night, the poet and journalist Marjolijn van Heemstra lay awake, unable to sleep—like so many of us feeling anxious and alienated, deeply exhausted yet restless. Amid the suffocating stream of daily obligations, the clamor of ... Read more

R273,98

**A New Scientist Best Popular Science Book of 2023How seeing Earth through the eyes of an astronaut brings new wonder and meaning to life on our planet.**One stifling summer night, the poet and journalist Marjolijn van Heemstra lay awake, unable to sleep—like so many of us feeling anxious and alienated, deeply exhausted yet restless. Amid the suffocating stream of daily obligations, the clamor of
... Read more
Audiobook

America's First Great Eclipse

How Scientists, Tourists, and the Rocky Mountain Eclipse of 1878 Changed Astronomy Forever

by Steve Ruskin ...

Narrated by John Pruden ...

Unabridged

2 hours 53 min

America’s First Great Eclipse takes readers on a thrilling historical journey, revealing that nineteenth-century Americans were just as excited about a total solar eclipse as we are today ... and, like us, were willing to travel thousands of miles to see it.The ‘Great American Eclipse’ of 2017 and the upcoming ‘Great North American Eclipse’ of 2024 were not the first eclipses to deserve such ... Read more

R145,21 or Free with Kobo Plus

America’s First Great Eclipse takes readers on a thrilling historical journey, revealing that nineteenth-century Americans were just as excited about a total solar eclipse as we are today ... and, like us, were willing to travel thousands of miles to see it.The ‘Great American Eclipse’ of 2017 and the upcoming ‘Great North American Eclipse’ of 2024 were not the first eclipses to deserve such
... Read more
Audiobook

All about Mars Journeys and Settlement

by Martin K. Ettington ...

Narrated by Martin K. Ettington ...

Unabridged

4 hours

A manned mission to Mars has been the dream of humanity at least since the nineteenth century when we first saw details of the surface and thought there might be canals filled with water there.Here I’ve looked at the history of unmanned exploration of Mars over the last fifty plus years, proposed missions to Mars, Mars Settlements, and other major issues regarding traveling to and living on Mars. ... Read more

R218,49 or Free with Kobo Plus

A manned mission to Mars has been the dream of humanity at least since the nineteenth century when we first saw details of the surface and thought there might be canals filled with water there.Here I’ve looked at the history of unmanned exploration of Mars over the last fifty plus years, proposed missions to Mars, Mars Settlements, and other major issues regarding traveling to and living on Mars.
... Read more
Audiobook

Handbook of Density Functional Theory, A

by N.B. Singh ...

Narrated by Digital Voice Mary G ...

Series Audiobook 3 - Computational Chemistry
Unabridged

2 hours 7 min

This audiobook is narrated by a digital voice."A Handbook of Density Functional Theory" serves as an accessible and comprehensive guide for absolute beginners venturing into the realm of theoretical chemistry and computational materials science. With clear explanations and practical examples, this book demystifies the fundamental concepts and techniques of Density Functional Theory (DFT), ... Read more

R38,36 or Free with Kobo Plus

This audiobook is narrated by a digital voice."A Handbook of Density Functional Theory" serves as an accessible and comprehensive guide for absolute beginners venturing into the realm of theoretical chemistry and computational materials science. With clear explanations and practical examples, this book demystifies the fundamental concepts and techniques of Density Functional Theory (DFT),
... Read more
Audiobook

Role of Private Companies in Space, The: SpaceX and Beyond

Space Exploration and the New Frontier

by Ciro Irmici ...

Narrated by Digital Voice Marcus G ...

Unabridged

2 hours 2 min

This audiobook is narrated by a digital voice.The Role of Private Companies in Space: SpaceX and Beyond explores the groundbreaking transformation of space exploration, driven by visionary private companies like SpaceX, Blue Origin, and Virgin Galactic. In this comprehensive and engaging book, you’ll discover how these companies have revolutionized space travel, from reusable rockets to the future ... Read more

R72,88 or Free with Kobo Plus

This audiobook is narrated by a digital voice.The Role of Private Companies in Space: SpaceX and Beyond explores the groundbreaking transformation of space exploration, driven by visionary private companies like SpaceX, Blue Origin, and Virgin Galactic. In this comprehensive and engaging book, you’ll discover how these companies have revolutionized space travel, from reusable rockets to the future
... Read more
Audiobook

Limitless: The Autobiography

The bestselling story of Britain’s inspirational astronaut

by Tim Peake ...

Narrated by Tim Peake ...

Unabridged

14 hours 17 min

Brought to you by Penguin.From the #1 bestselling author of Hello, is this Planet Earth? and Ask an Astronaut__________________'What surprised me was how entirely serene I felt. I was weightless, no forces exerting themselves on my body. To my left was the Space Station. Below me, gradually going into shadow, was the Earth. And over my right shoulder was the universe.'<... ... Read more

R281,83

Brought to you by Penguin.From the #1 bestselling author of Hello, is this Planet Earth? and Ask an Astronaut__________________'What surprised me was how entirely serene I felt. I was weightless, no forces exerting themselves on my body. To my left was the Space Station. Below me, gradually going into shadow, was the Earth. And over my right shoulder was the universe.'<...
... Read more
Audiobook

Aliens and Secret Technology—A Theory of the Hidden Truth

by Martin K. Ettington ...

Narrated by Martin K. Ettington ...

Unabridged

1 hour 40 min

This book is an overview of both the history of aliens and UFOS, as well as a review of hidden aerospace and propulsive technologies.Where did these technologies come from? And how have they developed in the intervening years?What are some of the Alien races which exist? Do we have a secret space force and are their secret bases on the moon?Also, I try to answer some questions of how likely some ... Read more

R126,94 or Free with Kobo Plus

This book is an overview of both the history of aliens and UFOS, as well as a review of hidden aerospace and propulsive technologies.Where did these technologies come from? And how have they developed in the intervening years?What are some of the Alien races which exist? Do we have a secret space force and are their secret bases on the moon?Also, I try to answer some questions of how likely some
... Read more
Audiobook

Kvanttikilpajuoksu

by Tommi Tenkanen, Timo Numminen ...

Narrated by Tuukka Haapaniemi ...

Unabridged

9 hours 36 min

Kilpajuoksu kohti suurta läpimurtoa.Kuinka supertietokoneet päihittävä kvanttitietokone rakennetaan?Auttaako tietokone hävittämään syövän? Murtuvatko internetin salausjärjestelmät? Voittaako Kiinan kontrolli lännen individualismin?Kvanttikilpajuoksu – Supertietokoneiden vallankumous kertoo uudenlaisen kvanttitietokoneen parissa ponnistelevien tutkijoiden, yritysten ja suurvaltojen kilpajuoksusta ... Read more

R290,59

Kilpajuoksu kohti suurta läpimurtoa.Kuinka supertietokoneet päihittävä kvanttitietokone rakennetaan?Auttaako tietokone hävittämään syövän? Murtuvatko internetin salausjärjestelmät? Voittaako Kiinan kontrolli lännen individualismin?Kvanttikilpajuoksu – Supertietokoneiden vallankumous kertoo uudenlaisen kvanttitietokoneen parissa ponnistelevien tutkijoiden, yritysten ja suurvaltojen kilpajuoksusta
... Read more
Audiobook

Time Travel Theory

by Introbooks Team ...

Narrated by Andrea Giordani ...

Unabridged

40 min

You have seen movies, you have read books and every time have thought whether you could do it too. The word ‘time travel’ itself brings a stir within and the fancies of what one could change if given the opportunity to go back in time or in the future. What might seem impossible for you has been tried and tested by many. They also have given many explanations of how time travel is possible. There ... Read more

R72,88 or Free with Kobo Plus

You have seen movies, you have read books and every time have thought whether you could do it too. The word ‘time travel’ itself brings a stir within and the fancies of what one could change if given the opportunity to go back in time or in the future. What might seem impossible for you has been tried and tested by many. They also have given many explanations of how time travel is possible. There
... Read more
Audiobook

Asteroid Mining: The Gold Rush of the Future

Space Exploration and the New Frontier

by Ciro Irmici ...

Narrated by Digital Voice Martin G ...

Unabridged

1 hour 43 min

This audiobook is narrated by a digital voice.Asteroid Mining: The Gold Rush of the Future takes you on an exciting journey into the next great frontier of human exploration—space. As our planet’s resources dwindle and space exploration advances, asteroids offer vast quantities of valuable metals, minerals, and water. But the real question is: How will we mine these distant rocks, and what are the ... Read more

R72,88 or Free with Kobo Plus

This audiobook is narrated by a digital voice.Asteroid Mining: The Gold Rush of the Future takes you on an exciting journey into the next great frontier of human exploration—space. As our planet’s resources dwindle and space exploration advances, asteroids offer vast quantities of valuable metals, minerals, and water. But the real question is: How will we mine these distant rocks, and what are the
... Read more

Rakuten Kobo

eReaders

Apps

Accessories

Shopping Cart

You're getting the VIP treatment!

Your Shopping Cart is empty

Available:

1 audiobook monthly

+ FREE 30-day trial

Available:

1 audiobook monthly

+ FREE 30-day trial

Recommended For You

Physics Audiobooks

A Short History of Nearly Everything

Becoming Supernatural: How Common People Are Doing The Uncommon

Four Thousand Weeks

A Brief History Of Time

Cosmos

Brief Answers to the Big Questions

Физика с Эйнштейном. Ключевые идеи в популярном изложении

Spaceflight

Historiqwo Numéro Un - Géocentrisme Et Héliocentrisme

Quantum Curiosities: A Journey Into the Heart of the Quantum World

Comment se Préparer pour Partir dans l'Espace

Asteroidenbergbau: Der Goldrausch der Zukunft

Quantum

Quantum Mechanics

In Light-Years There's No Hurry

America's First Great Eclipse

All about Mars Journeys and Settlement

Handbook of Density Functional Theory, A

Role of Private Companies in Space, The: SpaceX and Beyond

Limitless: The Autobiography

Aliens and Secret Technology—A Theory of the Hidden Truth

Kvanttikilpajuoksu

Time Travel Theory

Asteroid Mining: The Gold Rush of the Future