The Lizard Scientists–just published!

My new book “The Lizard Scientists: Studying Evolution in Action” is now published!  If your family loves reptiles or is fascinated by evolution, this book, illustrated by abundant photos, is for you. You’ll be amazed to read how scientists studying lizards on Caribbean islands are discovering how quickly these resilient …

When the Wolves Returned: Restoring Nature’s Balance in Yellowstone

In 1995 wolves were brought back to the Yellowstone ecosystem after an absence of about 70 years. Since then, the wolves have thrived, and the ecosystem has continued to become more diverse as other keystone species such beavers are returning and adding new habitat for a huge variety of living things.

The Inspiration for “Dogs on Duty”

The inspiration for book topics can come in surprising ways. When U.S. Navy Seals Team Six killed El Quida leader Osama bin Laden, the crew included a military working dog. When people learned a dog was involved in the raid, they wanted to learn everything about it–what breed, gender, and what work such dogs do.