Science

Kittens don't play -- they hunt. And their aloof appearance has evolutionary roots. A new book explains cats' mysterious nature and how their relationship with humans has changed over the years.

Adrian Raine argues that violent behavior has biological roots just like depression or schizophrenia. This raises questions about treatment, accountability and punishment, including the death penalty.

Jerry Seinfeld looked that if you have bloodstains on your clothes, you have bigger problems than laundry. But Jolie Kerr helps with all the stains in a new book, My Boyfriend Barfed in My Handbag.

The famed neurologist talks to Fresh Air about how grief, trauma, brain injury, medications and neurological disorders can trigger hallucinations — and about his personal experimentation with hallucinogenic drugs in the 1960s.

A center for scientists to study what helps dogs succeed in search-and-rescue operations opens Tuesday at the University of Pennsylvania. Dr. Cynthia Otto, who created the center, and Annemarie DeAngelo, the center's training director, tells Fresh Air why they depend on their canine companions.

Thor Hanson's new book looks at the evolutionary significance of feathers in birds. Hanson tells Fresh Air that he's amazed by birds' magnitude of feathers, how feathers grow and how they're the "most efficient insulation known."

Jill Tarter works at the SETI Institute, where scientists seek evidence of extraterrestrial lie in the universe by looking for some signatures of its technology. "The amount of searching that we've done in 50 years is equivalent to scooping one 8-ounce glass out of the Earth's ocean," she says.

In The Violinist's Thumb, writer Sam Kean goes inside our genetic code, looking at the stories written by the fundamental building blocks within us. The book explains things like why some people can't handle drinking coffee and why some human babies are born with tails.

In her new book, Breasts: A Natural and Unnatural History, Florence Williams offers her take on why breasts are getting bigger and developing earlier, why tumors seem to gravitate toward the breast, and how toxins from the environment may be affecting hormones and breast development.

Researchers want to create a widely effective drug that targets viruses much in the same way that penicillin kills a wide range of bacteria. Science writer Carl Zimmer profiles the scientists who are developing these antiviral drugs, and the technology behind it, in his latest piece for Wired magazine.