Humans have long observed animals for advanced warnings of danger. What can they tell us about the growing threat of contagion in the age of climate change?Diseases today reveal our close ties to animals. Viruses leap from bats to camels to humans. Cats catch the flu, and tourists pass tuberculosis to elephants. In recent years, however, something has changed. Exploitation of the environment is causing more diseases to jump species than ever before — a threat to li...

Humans have long observed animals for advanced warnings of danger. What can they tell us about the growing threat of viruses and other infectious organisms in the age of climate change? Coronaviruses jump from bats to chimpanzees to humans. You can give your cat the flu, and pass tuberculosis to an elephant. The scientific term for this –zoonosis – reveals how human and animal lives are inextricably linked. Scientists warn that human destruction of the environment is responsible for the ac...