The Republican health care overhaul faces opposition from many in the medical establishment. J. Scott Applewhite/AP hide caption
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A waxing crescent moon is seen behind a streetlight with a newly installed LED fixture in 2011 in Las Vegas. The city was replacing 6,600 existing lights with the energy-efficient LEDs. It has since replaced tens of thousands more. Ethan Miller/Getty Images hide caption
Shooting victims Patience Carter of Philadelphia (left) and Angel Santiago (right) listen as Dr. Brian Vickaryous speaks during a news conference Tuesday regarding the treatment of victims of the Pulse nightclub shooting in Orlando, Fla. Phelan M. Ebenhack/AP hide caption
In one study, reading a fictional news story about "obesity genes" led participants to eat more cookies in a subsequent task. iStockphoto hide caption
I think I see the problem. iStockphoto.com hide caption