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

Book of Why, The

The New Science of Cause and Effect

by Judea Pearl, Dana Mackenzie ...

Narrated by Mel Foster ...

Unabridged

15 hours 14 min

How the study of causality revolutionized science and the world"Correlation does not imply causation." This mantra has been invoked by scientists for decades, and has led to a virtual prohibition on causal talk. But today, that taboo is dead. The causal revolution, sparked by Judea Pearl and his colleagues, has cut through a century of confusion and placed causality--the study of cause and effect- ... Read more

$44.99 USD

How the study of causality revolutionized science and the world"Correlation does not imply causation." This mantra has been invoked by scientists for decades, and has led to a virtual prohibition on causal talk. But today, that taboo is dead. The causal revolution, sparked by Judea Pearl and his colleagues, has cut through a century of confusion and placed causality--the study of cause and effect-
... Read more
Audiobook

Monkeys, Myths, and Molecules

Separating Fact from Fiction, and the Science of Everyday Life

by Dr. Joe Schwarcz ...

Narrated by Garrett Goodison ...

Unabridged

8 hours 51 min

A healthy dose of scientific skepticism in the information age, from bestselling author Dr. Joe SchwarzThe internet is a powerful beast; no matter what question you may have, the answer is just a few keystrokes away. But with so many sources available, and so many conflicting answers, how do you know what information is reliable? In Monkeys, Myths, and Molecules, Dr. Joe Schwarcz takes a critical ... Read more

Was $19.99 USD Now $7.36 USD

A healthy dose of scientific skepticism in the information age, from bestselling author Dr. Joe SchwarzThe internet is a powerful beast; no matter what question you may have, the answer is just a few keystrokes away. But with so many sources available, and so many conflicting answers, how do you know what information is reliable? In Monkeys, Myths, and Molecules, Dr. Joe Schwarcz takes a critical
... Read more
Audiobook

Is That a Fact?

Frauds, Quacks, and the Real Science of Everyday Life

by Dr. Joe Schwarcz ...

Narrated by Garrett Goodison ...

Unabridged

9 hours 31 min

Dr. Joe Schwarcz takes on the quacks and doles out the facts in this eye-opening look at the science around usEat this and live to 100. Don’t, and die. Today, hyperboles dominate the media, which makes parsing science from fiction an arduous task when deciding what to eat, what chemicals to avoid, and what’s best for the environment. In Is That a Fact?, bestselling author Dr. Joe Schwarcz ... Read more

Was $19.99 USD Now $7.36 USD

Dr. Joe Schwarcz takes on the quacks and doles out the facts in this eye-opening look at the science around usEat this and live to 100. Don’t, and die. Today, hyperboles dominate the media, which makes parsing science from fiction an arduous task when deciding what to eat, what chemicals to avoid, and what’s best for the environment. In Is That a Fact?, bestselling author Dr. Joe Schwarcz
... Read more
Audiobook

Liquid Rules

The Delightful & Dangerous Substances that Flow Through Our Lives

by Mark Miodownik ...

Narrated by Michael Page ...

Unabridged

7 hours 16 min

A Physics Today Best Book of 2019Finalist for the Royal Society Insight Investment Science Book Prize Sometimes explosive, often delicious, occasionally poisonous, and always fascinating: the New York Times bestselling author of Stuff Matters offers an "entertaining discussion of the various ways our lives are enriched by fluids” (The Wall Street Journal).We know that we need water to survive, and ... Read more

$19.99 USD

A Physics Today Best Book of 2019Finalist for the Royal Society Insight Investment Science Book Prize Sometimes explosive, often delicious, occasionally poisonous, and always fascinating: the New York Times bestselling author of Stuff Matters offers an "entertaining discussion of the various ways our lives are enriched by fluids” (The Wall Street Journal).We know that we need water to survive, and
... Read more
Audiobook

Physics of the Impossible

A Scientific Exploration into the World of Phasers, Force Fields, Teleportation,and Time Travel

by Michio Kaku ...

Narrated by Feodor Chin ...

Unabridged

11 hours 49 min

A fascinating exploration of the science of the impossible—from death rays and force fields to invisibility cloaks—revealing to what extent such technologies might be achievable decades or millennia into the future.One hundred years ago, scientists would have said that lasers, televisions, and the atomic bomb were beyond the realm of physical possibility. In Physics of the Impossible, the renowned ... Read more

$22.50 USD

A fascinating exploration of the science of the impossible—from death rays and force fields to invisibility cloaks—revealing to what extent such technologies might be achievable decades or millennia into the future.One hundred years ago, scientists would have said that lasers, televisions, and the atomic bomb were beyond the realm of physical possibility. In Physics of the Impossible, the renowned
... Read more
Audiobook

Human Psychology and Language Analysis

For Advancing Linguistic Artificial Intelligence

by Allen Young ...

Narrated by Allen Young ...

Series Audiobook 6 - The Robocentric Transhumanism Advancement Foundation Series
Unabridged

40 min

Humans use their languages to communicate for their successes in the survival, social, economic, sexual, political, competitive, collaborative, creative, and procreative human endeavors.In this book, Allen Young, the transhumanistic Asian-American man, specifies how the psychological human linguistic capabilities should be used in advancing linguistic artificial intelligence. ... Read more

$3.10 USD

Humans use their languages to communicate for their successes in the survival, social, economic, sexual, political, competitive, collaborative, creative, and procreative human endeavors.In this book, Allen Young, the transhumanistic Asian-American man, specifies how the psychological human linguistic capabilities should be used in advancing linguistic artificial intelligence.
... Read more
Audiobook

The Future Is Faster Than You Think

How Converging Technologies Are Transforming Business, Industries, and Our Lives

by Peter H. Diamandis, Steven Kotler ...

Narrated by Peter H. Diamandis ...

Unabridged

9 hours 53 min

Audio Bonus! Includes exclusive conversations with the authors!From the New York Times bestselling authors of Abundance and Bold comes a practical playbook for the future of technology and technological convergence in our modern era.In their book Abundance, bestselling authors and futurists Peter Diamandis and Steven Kotler tackled grand global challenges, such as poverty, hunger, and energy. Then ... Read more

$25.99 USD

Audio Bonus! Includes exclusive conversations with the authors!From the New York Times bestselling authors of Abundance and Bold comes a practical playbook for the future of technology and technological convergence in our modern era.In their book Abundance, bestselling authors and futurists Peter Diamandis and Steven Kotler tackled grand global challenges, such as poverty, hunger, and energy. Then
... Read more
Audiobook

Race for Tomorrow

Survival, Innovation and Profit on the Front Lines of the Climate Crisis

by Simon Mundy ...

Narrated by Simon Mundy ...

Unabridged

10 hours 47 min

As featured on CNN’s Amanpour & Company and BBC Radio 4’s Start the Week with Andrew Marr One of the Financial Times’ best books of 2021In this compelling journey through twenty-six countries, Simon Mundy traces how the struggle to respond to the climate crisis is rapidly reshaping the modern world – shattering communities, shaking global business and propelling waves of cutting-edge innovation ... Read more

$20.46 USD

As featured on CNN’s Amanpour & Company and BBC Radio 4’s Start the Week with Andrew Marr One of the Financial Times’ best books of 2021In this compelling journey through twenty-six countries, Simon Mundy traces how the struggle to respond to the climate crisis is rapidly reshaping the modern world – shattering communities, shaking global business and propelling waves of cutting-edge innovation
... Read more
Audiobook

Loonshots

How to Nurture the Crazy Ideas That Win Wars, Cure Diseases, and Transform Industries

by Safi Bahcall ...

Narrated by Safi Bahcall, William Dufris ...

Unabridged

10 hours 14 min

Washington Post's "10 Leadership Books to Watch for in 2019," Adam Grant's "19 New Leadership Books to Read in 2019," Inc.com's "10 Business Books You Need to Read in 2019," Business Insider's "14 Books Everyone Will Be Reading in 2019"This program includes a prologue and introduction read by the author.What do James Bond and Lipitor have in common? What can we learn about human nature and world ... Read more

$26.99 USD

Washington Post's "10 Leadership Books to Watch for in 2019," Adam Grant's "19 New Leadership Books to Read in 2019," Inc.com's "10 Business Books You Need to Read in 2019," Business Insider's "14 Books Everyone Will Be Reading in 2019"This program includes a prologue and introduction read by the author.What do James Bond and Lipitor have in common? What can we learn about human nature and world
... Read more
Audiobook

Биология и медицина. Загадки познания

by Александр Волков ...

Narrated by Всеволод Кузнецов ...

Series series Время. События. Люди
Unabridged

5 hours 16 min

Порой прописные истины, в которые верили на протяжении десятилетий, оказываются напрочь неверны. Яркий пример тому являет психология. Здесь смутные догадки легко находят себе подтверждение, а факты вписываются в выстроенную вами гипотезу. Обремененная ими она становится теорией. Ее воспринимают как непререкаемую правду. Она с легкостью интерпретирует любые человеческие поступки. Она превращается в ... Read more

$3.40 USD

Порой прописные истины, в которые верили на протяжении десятилетий, оказываются напрочь неверны. Яркий пример тому являет психология. Здесь смутные догадки легко находят себе подтверждение, а факты вписываются в выстроенную вами гипотезу. Обремененная ими она становится теорией. Ее воспринимают как непререкаемую правду. Она с легкостью интерпретирует любые человеческие поступки. Она превращается в
... Read more
Audiobook

Infectious

Pathogens and How We Fight Them

by John S. Tregoning ...

Narrated by Mike Cooper ...

Unabridged

9 hours 35 min

The subject of infection and how to fight it grows more urgent every day. How do pathogens cause disease? And what tools can we give our bodies to do battle? Dr. John S. Tregoning has dedicated his career to answering these questions. Infectious uncovers fascinating success stories in immunology and virology, making this book not only a vital overview of infection but also a hopeful history of ... Read more

$24.99 USD

The subject of infection and how to fight it grows more urgent every day. How do pathogens cause disease? And what tools can we give our bodies to do battle? Dr. John S. Tregoning has dedicated his career to answering these questions. Infectious uncovers fascinating success stories in immunology and virology, making this book not only a vital overview of infection but also a hopeful history of
... Read more
Audiobook

Maskiner der tænker

by Inga Strümke ...

Narrated by Jesper Platz ...

Unabridged

9 hours 36 min

Selvom det føles nyt, kan videnskaben om kunstig intelligens spores tilbage til 1956. I bogens første del gennemgår Strümke historien om kunstig intelligens – en historie fuld af mærkelige anekdoter og sjove historier.Udviklingen i de senere år betyder, at StrChatbotten ChatGPT er på kort tid blevet et populært redskab verden over. Teknologien har taget et kvantespring. Men hvad sker der, når ... Read more

$35.22 USD

Selvom det føles nyt, kan videnskaben om kunstig intelligens spores tilbage til 1956. I bogens første del gennemgår Strümke historien om kunstig intelligens – en historie fuld af mærkelige anekdoter og sjove historier.Udviklingen i de senere år betyder, at StrChatbotten ChatGPT er på kort tid blevet et populært redskab verden over. Teknologien har taget et kvantespring. Men hvad sker der, når
... Read more
Audiobook

Физика и Химия. Гипотезы и аксиомы

by Александр Волков ...

Narrated by Всеволод Кузнецов ...

Series series Время. События. Люди
Unabridged

3 hours 5 min

Основоположники европейской философии, древние греки, разделяли эту науку на физику, логику и этику, называя физикой учение о бытии, логикой – учение о познании и этикой – учение о ценностях. Неудивительно, что важнейшая для них модель натурфилософии (для нас – физики) – учение о четырех стихиях, или четырех первоэлементах – создается философами, пытавшимися понять, как возник окружающий мир, что ... Read more

$3.40 USD

Основоположники европейской философии, древние греки, разделяли эту науку на физику, логику и этику, называя физикой учение о бытии, логикой – учение о познании и этикой – учение о ценностях. Неудивительно, что важнейшая для них модель натурфилософии (для нас – физики) – учение о четырех стихиях, или четырех первоэлементах – создается философами, пытавшимися понять, как возник окружающий мир, что
... Read more
Audiobook

Астрономия. Теории и факты

by Александр Волков ...

Narrated by Всеволод Кузнецов ...

Series series Время. События. Люди
Unabridged

3 hours 7 min

Вот уже более двух десятилетий, с тех пор как была открыта первая экзопланета – планета, лежащая за пределами Солнечной системы, - астрономы ведут поиск "второй Земли", где сложились условия обитания, схожие с земными. Противоземля – тоже двойник Земли, но искать ее следовало не в далеких звездных мирах, а совсем рядом. Она якобы обращалась по той же орбите, что и Земля, двигаясь синхронно с ней, ... Read more

$3.40 USD

Вот уже более двух десятилетий, с тех пор как была открыта первая экзопланета – планета, лежащая за пределами Солнечной системы, - астрономы ведут поиск "второй Земли", где сложились условия обитания, схожие с земными. Противоземля – тоже двойник Земли, но искать ее следовало не в далеких звездных мирах, а совсем рядом. Она якобы обращалась по той же орбите, что и Земля, двигаясь синхронно с ней,
... Read more
Audiobook

Pseudoscience

A Very Short Introduction

by Michael D. Gordin ...

Narrated by Kyle Snyder ...

Unabridged

3 hours 19 min

Everyone has heard of the term "pseudoscience," typically used to describe something that looks like science, but is somehow false, misleading, or unproven. Given the virulence of contemporary disputes over the denial of climate change and anti-vaccination movements—both of which display allegations of "pseudoscience" on all sides—there is a clear need to better understand issues of scientific ... Read more

$12.99 USD

Everyone has heard of the term "pseudoscience," typically used to describe something that looks like science, but is somehow false, misleading, or unproven. Given the virulence of contemporary disputes over the denial of climate change and anti-vaccination movements—both of which display allegations of "pseudoscience" on all sides—there is a clear need to better understand issues of scientific
... Read more
Audiobook

Full Spectrum

How the Science of Color Made Us Modern

by Adam Rogers ...

Narrated by Michael Crouch ...

Unabridged

9 hours 51 min

"Informative and entertaining...Rogers is a seasoned raconteur, unreeling an eons-spanning tale with skill." —Wall Street JournalA lively account of our age-old quest for brighter colors, which changed the way we see the world, from the best-selling author of Proof: The Science of BoozeFrom kelly green to millennial pink, our world is graced with a richness of colors. But our human-made colors ... Read more

$28.99 USD

"Informative and entertaining...Rogers is a seasoned raconteur, unreeling an eons-spanning tale with skill." —Wall Street JournalA lively account of our age-old quest for brighter colors, which changed the way we see the world, from the best-selling author of Proof: The Science of BoozeFrom kelly green to millennial pink, our world is graced with a richness of colors. But our human-made colors
... Read more
Audiobook

SuperSight

What Augmented Reality Means for Our Lives, Our Work, and the Way We Imagine the Future

by David Rose ...

Narrated by Simon Mattacks ...

Unabridged

8 hours 39 min

For thousands of years, human vision has been largely unchanged by evolution.We’re about to get a software update.Today, Apple, Google, Microsoft, Facebook, Snap, Samsung, and a host of startups are racing to radically change the way we see. The building blocks are already falling into place: cloud computing and 5G networks, AI computer vision algorithms, smart glasses and VR headsets, and mixed ... Read more

$35.99 USD

For thousands of years, human vision has been largely unchanged by evolution.We’re about to get a software update.Today, Apple, Google, Microsoft, Facebook, Snap, Samsung, and a host of startups are racing to radically change the way we see. The building blocks are already falling into place: cloud computing and 5G networks, AI computer vision algorithms, smart glasses and VR headsets, and mixed
... Read more
Audiobook

The Forgotten Sense

The New Science of Smell—and the Extraordinary Power of the Nose

by Jonas Olofsson ...

Narrated by Adam Verner ...

Unabridged

6 hours 57 min

A New York Public Library "Best Book of the Year"“The Forgotten Sense leaves us with the hope of new discoveries and new recoveries—so that we may once again revel in the glorious, fragrant world around us.”—Wall Street JournalBy one of the world’s leading researchers into the science of smell, a fascinating exploration of our most essential yet least understood sense—enabling us to appreciate ... Read more

$23.99 USD

A New York Public Library "Best Book of the Year"“The Forgotten Sense leaves us with the hope of new discoveries and new recoveries—so that we may once again revel in the glorious, fragrant world around us.”—Wall Street JournalBy one of the world’s leading researchers into the science of smell, a fascinating exploration of our most essential yet least understood sense—enabling us to appreciate
... Read more
Audiobook

Sind wir alleine im Universum?

Meine Suche nach Leben im All

by Lisa Kaltenegger ...

Narrated by Vaile Fuchs ...

Unabridged

5 hours 8 min

Auf der Suche nach einer zweiten ErdeHaben Sie gewusst, dass es in unserer Galaxie Milliarden potenziell lebensfreundliche Planeten gibt?Lisa Kaltenegger begibt sich auf Spurensuche nach den sogenannten Exoplaneten und erklärt, unter welchen Umständen außerirdisches Leben möglich ist.Die Wissenschaft ist näher dran als je zuvor, das Rätsel um Leben im All zu lösen. Lisa Kaltenegger, die ... Read more

$21.04 USD

Auf der Suche nach einer zweiten ErdeHaben Sie gewusst, dass es in unserer Galaxie Milliarden potenziell lebensfreundliche Planeten gibt?Lisa Kaltenegger begibt sich auf Spurensuche nach den sogenannten Exoplaneten und erklärt, unter welchen Umständen außerirdisches Leben möglich ist.Die Wissenschaft ist näher dran als je zuvor, das Rätsel um Leben im All zu lösen. Lisa Kaltenegger, die
... Read more
Audiobook

Microbiótica y remineralización de suelos en manos campesinas

by Jesús Ignacio Simón Zamora ...

Unabridged

3 hours 5 min

Hablar de microbiología a los agricultores, y especialmente a los campesinos de bajos recursos, ha sido un tema vedado en la actualidad.Si queremos comprender a fondo las relaciones de nutrientes del suelo con las plantas y los minerales que por acción de los microorganismos se disuelven para ser tomados por las plantas, la microbiología del suelo es un tema fundamental.Pero además, es importante ... Read more

$9.99 USD

Hablar de microbiología a los agricultores, y especialmente a los campesinos de bajos recursos, ha sido un tema vedado en la actualidad.Si queremos comprender a fondo las relaciones de nutrientes del suelo con las plantas y los minerales que por acción de los microorganismos se disuelven para ser tomados por las plantas, la microbiología del suelo es un tema fundamental.Pero además, es importante
... Read more
Audiobook

Geheilt statt behandelt

Warum die Medizin am Ende ist und wie unsere Gesundheit eine Zukunft hat

by Prof. Dr. Harald Schmidt, Prof. Dr. Harald Schmidt ...

Narrated by Prof. Dr. Harald Schmidt ...

Unabridged

14 hours 16 min

Die Medizin ist krank. Die meisten Erkrankungen verstehen wir nicht und behandeln daher nur Symptome, aber nicht die Ursachen. Arzneimittel und andere Therapien helfen den wenigsten Patienten, wir pumpen mehr und mehr Geld ohne jeden Mehrwert in unser Gesundheitssystem, eigentlich ein Krankheitssystem.Doch der international renommierte Mediziner Harald Schmidt sagt das Ende der Medizin, wie wir ... Read more

$24.01 USD

Die Medizin ist krank. Die meisten Erkrankungen verstehen wir nicht und behandeln daher nur Symptome, aber nicht die Ursachen. Arzneimittel und andere Therapien helfen den wenigsten Patienten, wir pumpen mehr und mehr Geld ohne jeden Mehrwert in unser Gesundheitssystem, eigentlich ein Krankheitssystem.Doch der international renommierte Mediziner Harald Schmidt sagt das Ende der Medizin, wie wir
... Read more
Audiobook

Human Creativity Analysis

For Advancing Artificial Intelligence and Robotics

by Allen Young ...

Narrated by Allen Young ...

Series Audiobook 5 - The Robocentric Transhumanism Advancement Foundation Series
Unabridged

33 min

'How do humans create?''How does the human creativity work?'This book answers the most important questions in how the human creativity works, for advancing artificial intelligence and robotics that will heighten and exponentially increase human creativity on Earth and in outer space. ... Read more

$3.10 USD

'How do humans create?''How does the human creativity work?'This book answers the most important questions in how the human creativity works, for advancing artificial intelligence and robotics that will heighten and exponentially increase human creativity on Earth and in outer space.
... Read more
Audiobook

El universo en tu taza de café: La física cotidian

by Dr. Elías Nodos ...

Narrated by Voz Digital Luis G ...

Unabridged

1 hour 59 min

Este audiolibro está narrado por una voz digital.El Universo en Tu Taza de Café: La Física Cotidiana Explicada¿Y si la ciencia no estuviera solo en los laboratorios, sino también en tu cocina, en tu paseo diario, ¡incluso en tu taza de café?Olvídate de las ecuaciones complicadas y los conceptos abstractos que parecen inalcanzables. "El universo en tu taza de café" es tu guía amigable y ... Read more

$2.99 USD

Este audiolibro está narrado por una voz digital.El Universo en Tu Taza de Café: La Física Cotidiana Explicada¿Y si la ciencia no estuviera solo en los laboratorios, sino también en tu cocina, en tu paseo diario, ¡incluso en tu taza de café?Olvídate de las ecuaciones complicadas y los conceptos abstractos que parecen inalcanzables. "El universo en tu taza de café" es tu guía amigable y
... Read more
Audiobook

Chain Reaction

How Chemistry Shapes Us and Our World

by Ijeoma Uchegbu ...

Narrated by Ijeoma Uchegbu ...

Unabridged

10 hours 47 min

By one of the world’s leading chemists, an entertaining and revealing tour of the chemical bonds that shape our everyday lives and provide the infrastructure for our chaotic world.We all have a relationship with chemistry. Bonds between molecules, forged and broken in the blink of an eye, underpin everything from the food we eat and the clothes we wear to the ways we treat illnesses and construct ... Read more

$28.99 USD

By one of the world’s leading chemists, an entertaining and revealing tour of the chemical bonds that shape our everyday lives and provide the infrastructure for our chaotic world.We all have a relationship with chemistry. Bonds between molecules, forged and broken in the blink of an eye, underpin everything from the food we eat and the clothes we wear to the ways we treat illnesses and construct
... 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

Applied Sciences Audiobooks

Book of Why, The

Monkeys, Myths, and Molecules

Is That a Fact?

Liquid Rules

Physics of the Impossible

Human Psychology and Language Analysis

The Future Is Faster Than You Think

Race for Tomorrow

Loonshots

Биология и медицина. Загадки познания

Infectious

Maskiner der tænker

Физика и Химия. Гипотезы и аксиомы

Астрономия. Теории и факты

Pseudoscience

Full Spectrum

SuperSight

The Forgotten Sense

Sind wir alleine im Universum?

Microbiótica y remineralización de suelos en manos campesinas

Geheilt statt behandelt

Human Creativity Analysis

El universo en tu taza de café: La física cotidian

Chain Reaction