Citizen scientists track neighborhood squirrels with Project Squirrel
October 14, 2015, 10:13 a.m. by Jaymi Heimbuch
While squirrels collect nuts and seeds for winter, you can collect invaluable data for research.
Which U.S. states have the most endangered species? [Infographic]
September 21, 2015, 11:50 a.m. by Russell McLendon
Here's a graphical glimpse at America's most endangered wildlife, where they live and how many are left.