A Maine coon cat named Mittens became an accidental jetsetter this month when her cage was overlooked in a plane cargo hold and she made three trips in 24 hours between New Zealand and Australia.

They've evolved at least five times in mammals, most notably in the saber-tooth cat Smilodon, who sported serrated sabers that could measure nearly one foot long. But behind the fearsome ...

They've evolved at least five times in mammals, most notably in the saber-tooth cat Smilodon, who sported serrated sabers that could measure nearly one foot long. But behind the fearsome appearance of ...