A DNA study finds the world's last-known mammoths were American-born.
To impress competitors, anole lizards start each day with a vigorous exercise routine.
Young orange clownfish find their anemone homes with a keen sense of smell.
Baby bugs come up with creative, aggressive ways to get their parent's attention.
Cells transformed inside a diabetic mouse become successful insulin-producers.
Capuchin monkeys show they almost always opt to share with friends and family.