Conservation has long been a part of Namibia's story – but not always to the benefit of wildlife or people.

Three U.S.-born scientists won the Nobel Prize in physics on Tuesday for their studies of exploding stars that revealed that the expansion of the universe is accelerating. The three will share $1.5 million.

Both women and men eat less when their dining companions are men, according to new research in the Journal of Applied Social Psychology.

Guy Raz speaks with Adam Steinman, the son of the Ralph Steinman, who won the Nobel Prize for medicine days after he died of cancer.

Ralph Steinman won the Nobel Prize for medicine days after he died of cancer. However, the Nobel committee, which typically only awards the prize to living scientists, didn't know Steinman had passed away.

The now-bankrupt solar company Solyndra was just one of the clean energy businesses that got loan guarantees from a federal program that ended Friday. In all, the Department of Energy program financed 28 projects with $16 billion. A Republican leading hearings on Solyndra says loans were rushed out the door.

Child nutrition researchers at Cornell took away the standard lunch line treatment of fresh fruit at three schools, and put the produce into colorful, good-looking baskets near the cash register. The result? Double the sales.