July 22, 2015
Special | 28m 19s
Danforth Plant Science Center research on algae led to a discovery about the origins of sex. Dinosaur expert Mark Norell has been dubbed “the coolest dude alive.” Washington State's Elwha River after a dam is removed. New York’s Story Collider performers take the stage to entertain audiences. St. Louis University gerontologist Dr. John Morley talks the dangers of a deficiency of common sense.
Aired: 07/21/15Video has closed captioning.