Weekend All Things Considered

Dr. Ilse Levin specializes in internal medicine, but you could say she really focuses on incarceration medicine.

Anthropologists believe early humans evolved in Africa and then moved out from there in successive waves. However, what drove their migrations has been a matter of conjecture.

One new explanation is climate change.

Anthropologist Anders Erikkson of Cambridge University in England says the first few hardy humans who left Africa might've gone earlier but couldn't. Northeastern Africa — the only route to Asia and beyond — was literally a no man's land.

An apple a day might keep the doctor away, but what do you do when there are no apples? It's a question western Michigan's apple growers are dealing with this season after strange weather earlier in the year decimated the state's apple cultivation.

Michigan is the third-largest apple producer in the U.S. after New York and Washington, but the state's apples will soon be in short supply. Now in the middle of harvest season, growers are picking only 10 percent to 15 percent of their normal crop.

Believe it or not, there's a lot of food involved in wet-plate photography. Egg whites (albumen) are used to make the glass plates adhesive to the light-sensitive chemicals. And one way to keep the plates from drying out after processing is to coat them in honey. It's also physically demanding, so you get really hungry.