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Keep your kids away from third-hand smoke

In a new study, published in the Journal of Exposure Science & Environmental Epidemiology, researchers tested the surfaces in smoking households where children reside and found troubling results, says Ashley Merianos, a tobacco researcher at the University of Cincinnati who led the study. 

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Why is pee yellow mystery solved

The enzyme that makes urine yellow has been finally identified. It has been known for more than 125 years that a compound called urobilin is responsible for urine's yellow colour. But it was unclear how exactly it is created from the red-orange bilirubin.

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Captive vultures can rewild and join the flock

We know from watching the movie Fly Away Home with Anna Paquin that Canadian geese bred in captivity identify and imprint on the first mother they see. We also learn that Canadian geese can learn to fly with airplanes, and then evetually rewild. True story. Does the Fly Away Home theory really work for all birds?