Because I am interested in the growth and development of early hominids, I play with my kids, you know, looking at their teeth or measuring their heads, which they like also, because it's kind of fun.

I'm a paleoanthropologist, and my job is to define man's place in nature and explore what makes us human.

At age three, if you have a still-growing brain, it's a human behavior. In chimps, by age three, the brain is formed over 90 percent. That's why they can cope with their environment very easily after birth - faster than us, anyway. But in humans, we continue to grow our brains. That's why we need care from our parents.

I learned that the first technology appeared in the form of stone tools, 2.6 million years ago. First entertainment comes evidence from flutes that are 35,000 years old. And evidence for first design comes 75,000 years old - beads. And you can do the same with your genes and track them back in time.

In the States, you can buy Chinese food. In Beijing you can buy hamburger. It's very close. Now I feel the world become a big family, like a really big family. You have many neighbors. Not like before, two countries are far away.

The most rewarding aspect of parenting is seeing my children be authentic. The most rewarding thing for me is to see them do anything that they're proud of.

I've been a Goodwill Ambassador for the UNICEF and the UNICEF family for more than twelve years.

My parents couldn't give me a whole lot of financial support, but they gave me good genes. My dad is a handsome son-of-a-gun, and my mom is beautiful. And I've definitely been the lucky recipient. So, thank you, Mom and Dad.