Brazilian researchers are using laser technology to unearth a lost Portuguese colony and challenge long-held beliefs about human settlement in the Amazon.

Submissions already include some stunning wildlife photography, including a sleepy lion cub on a dirt road, a mountain goat ...

The large leaves of the aguaje, a tropical palm tree that grows in the peatlands and other seasonal wetland areas in tropical ...

Each spring, hundreds of thousands of cranes converge in Nebraska. The phenomenon draws in artists, conservationists and curious friends alike.