- According to ancient Greek literature, when Odysseus arrived home after an absence of 20 years, disguised as a beggar, the only one to recognize him was his aged dog Argos, who wagged his tail at his master, and then died.

 - Each day in the U.S, animal shelters are forced to destroy approximately 30,000 dogs and cats.

 - Barbara Bush's book about her English Springer Spaniel, Millie's book, was on the bestseller list for 29 weeks. Millie was the most popular "First Dog" in history.

 - Ever notice that cats' eyes appear to glow in the dark? That's because a reflective layer, the tapetum licidium, possesses crystal-like reflective properties.

 - A blue whale's testicles are the size of a family car.