1. Dogs don't really distinguish consonants in human speech so much as vowel sounds. For them, "Maybe" sounds pretty much the same as "Bailey." This can work to great amusement if you want to adjust their commands.
2. Sickle-cell anemia is an evolutionary defense against malaria. In environments where malaria is not so widespread (ie. the United States), this defense proves to be more self-destructive than anything else.
3. The kakapo is the world's only flightless parrot. It is also nocturnal, weighs several pounds, and is reported to smell like perfume. Once roaming New Zealand in the hundreds of thousands, there are now only about 150 in the world (up from an all-time low of about 40), and those only through the hard work of dedicated conservationists.
More random facts to come as they come to me.