- 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.

 - President Lyndon Johnson had two beagles named Him and Her

 - The membranes of a dog's nose, if unfolded and laid out, would be larger than the dog itself.

 - The Wizard of Oz’s Toto was played by a female Cairn Terrier named Terry

 - An elephant's trunk contains more than 50,000 muscles.