From "What do you most enjoy about your work as a scientist?" to "What's your favorite kids book?", find out how conservation biologist Felicity Arengo answered kids' questions
How stellar is your knowledge of stars? Test yourself with this interactive quiz.
In the Milky Way Galaxy alone, there are hundreds of billions of stars. But that hasn't always been the case... Take a look at the life cycle of stars in this photo gallery.
Burning fossil fuels like coal and oil provide the energy that we need … but also contribute to climate change. Find out more about Earth's warming climate, its consequences, and what we can do.
What was Earth like millions of years ago? Explore fossil evidence about our planet’s past to discover how different Earth once looked.
Travel to Africa's lower Congo River with ichthyologist Melanie Stiassny, and explore one of the most diverse fish communities in the world.
From Greenland to South Africa to the bottom of ocean, Ed Mathez has journeyed to study rocks. Find out where his interest began and what he’s discovered on his travels.
Ross MacPhee has always loved dirt. To him it means the opportunity to find lost things — from bones and teeth to pirate treasure. Learn more about what he’s discovered recently.
How many fish species are there on the planet today? Meet a scientist who is forever trying to answer that very question.
Tracking a gorilla can get hairy. Literally. Just ask George Amato, who collects hair from endangered eastern lowland gorillas to study their DNA.