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Monogamy may sound sweet, but why it evolved isn't

Only a few species of mammals are monogamous, and now dueling scientific teams think they've figured out why they got that way. But their answers aren't exactly romantic.Full story

Be Mine! Why Monogamy Evolved in Mammals

Male primates may have become monogamous to protect their offspring from being killed by rival males, a new study finds. However, others disagree, saying monogamy evolved in mammals so that males could guard their mates. Full story

Cold-Blooded Dinosaur Theory Put on Ice

Dinosaurs may have produced their own body heat, making them warm-blooded, new research suggests. Full story

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Vote: What Would You Name Squirrelly Mammal Ancestor?

Meet Your Mama: First Ancestor of All Placental Mammals Revealed

'Grave robber' survived the dinosaurs

Bats think about sex — a lot

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Video

  World's oldest manatee gets a check-up

Veterinarians check the health of the world's oldest manatee and say that studying these sea mammals is a great learning experience for scientists. WFLA's John Rogers reports.

  138 scaly anteaters found in smuggler's possession

Eleven of the mammals died in the incident and the rest will be released back into the wild. Msnbc.com's Al Stirrett reports.

  Whale sighted in San Diego bay

Massive marine mammal delights onlookers in Mission Bay. Nicole Gonzales reports.

  Counting heads at the London Zoo

Keepers at the London Zoo are spending the next weeks counting every mammal, bird, reptile amphibian and invertebrate housed at the zoo. TODAY.com's Dara Brown reports.

  Mastodon bones uncovered at construction site

Ancient bones of the large tusked mammal are uncovered at a Daytona Beach Fla., construction site. WESH's Claire Metz reports.

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Related Photos

Preserved dolphin is seen as a tour guide teaches students about mammals at Ancol Smart House in Jakarta
Preserved dolphin is seen as a tour guide teaches students about mammals at Ancol Smart House in Jakarta

REFILE - CLARIFYING NAME OF PR OFFICER A preserved dolphin is seen as a tour guide teaches students about mammals at Ancol Smart House in Jakarta May 16, 2013. Ancol Smart House has about 20 animals preserved as means to educate visitors about their life in the wild. 15 million visitors visited th

Tour guide shows preserved dolphin as she teaches students about mammals at Ancol Smart House in Jakarta
Tour guide shows preserved dolphin as she teaches students about mammals at Ancol Smart House in Jakarta

REFILE - CLARIFYING NAME OF PR OFFICER A tour guide shows a preserved dolphin as she teaches students about mammals at Ancol Smart House in Jakarta May 16, 2013. Ancol Smart House has about 20 animals preserved as means to educate visitors about their life in the wild. 15 million visitors visited