August 5, 2015
Special | 28m 8s | Video has closed captioning.
Extensive laboratory analysis has revealed just why the Arch has stains and answered the question: is it dirt or damage? Scientists are working to fight the fast-spreading disease that’s decimating the bat population. How some math teachers are developing innovative methods to enhance learning retention. Poachers who want White sturgeon eggs for caviar are putting the species survival in peril.
Problems Playing Video? | Closed Captioning