AGGRESSION

11 Hefty Facts About Hippos

They look docile and sluggish in those popular nature documentaries, but hippopotamuses have a violent side.

Is Rudeness Contagious?

Bad behavior spreads between people like cold germs, according to research.

Iceland Is Officially the Most Peaceful Country on Earth

If you're worried about traveling, just remember: the U.S. doesn't even crack the top 100.

Germans Surrender in SW Africa

5 Common Complaints About Automatic Flush Toilets

The Key to Tasmanian Devil Survival? Being Less Aggressive

Though they're delightfully adorable, Tasmanian devils don't have a reputation for being sweet and cuddly (just look at that Taz on Looney Tunes!). But according to a new study, evolving to be less ferocious might be the only thing that could keep them fr