Winter means a lot of indoor time, and I've learned that science experiments are a lifesaver on those long, cold days. The best part? You don't need anything fancy. Baking soda, vinegar, food ...
(Original Caption) Lana, a 21/2 year old chimpanzee, uses a typewriter like device to punch out sentences using symbols for words in an experiment April 27th at the Yerkes Regional Primate Center at ...
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