Whether you walk, bike or ride affects how much bad air you breathe.
Study reveals how ants use antibiotic-producing bacteria to keep fungus gardens free of parasitic pests.
Santa's workhorses develop a unique internal clock to deal with the months-long lack of daylight, a new study shows.
Scientists are surprised to learn that unlike humans, these dogs don't have to slow down in the turns.
SPECIAL REPORT, PART 2: Everything you need to know about preventing the flu and what to do if you get it.
Flu season is just around the corner, and concern of a global pandemic has never been higher. But what is the flu, what are the real dangers, and what can you do?