What frustrated squirrels can teach us about perseverance
May 16, 2016, 8:58 a.m. by Russell McLendon
Exasperation may be key to problem solving, scientists say after studying squirrels' at a balky vending machine.
As U.N. makes history on Earth Day, Leonardo DiCaprio reminds us not to rest on laurels
April 22, 2016, 2:31 p.m. by Russell McLendon
More than 170 world leaders signed the Paris Agreement on Earth Day 2016, but that's just the beginning.