Scientists don't know whether orcas kill for fun. The marine mammals do some things ... Marilyn Perkins is a science writer and illustrator based in Los Angeles, California.

A red panda at Smithsonian's National Zoo. Katie Fancher, Smithsonian Science Education Center Red pandas use sounds to communicate, but the sounds are generally very quiet. Sounds they use for ...

Discover interesting facts about where sharks live ... all kill more people every year than sharks do. Michael Dhar is a science editor and writer based in Chicago. He has an MS in bioinformatics ...