From spraying mates with urine to changing one's sex, these are the most intriguing courtships in the animal kingdom.

For some animals, reproduction comes at the ultimate cost—their own lives. While this may seem extreme, it's a natural strategy to maximize reproductive success. These species invest everything into ...

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. From Maine to Florida, springtime ocean currents always bring ...

Sloths have a very unusual mating call, but for a very good reason. Read here to learn about sloths mating calls, and ...