A growing number of children are entering puberty at younger ages — sometimes as young as 6 or 7. But in many schools, sex education classes don't begin before the fifth grade.
Researchers excavated the remains of five creatures who lived 1.8 million years ago, including this adult male skull. The excavation site, in Georgia in the former Soviet Union, was home to a remarkable cache of bones.
Courtesy of Georgian National Museum
Daisy Coleman, now 16, looks at trophies and other awards she's won for beauty pageants, dancing and sports. She has attempted suicide at least twice since waking up in freezing temperatures on her doorstep.
Jack London's 1903 The Call of the Wild was a sensation — it sold one million copies and made London the most popular American writer of his generation. He's shown above in 1916, shortly before his death at age 40.