11. Red and yellow, kill a fellow… : …red and black, friend of Jack. This mantra helps amateur and professional naturalists alike tell the difference between the deadly coral snake and the entirely harmless scarlet kingsnake.
12. Spiders are not insects. : Many people lump spiders in with the insects, but their eight legs, simplistic eye structure, and lack of wings do not place them in that classification. Rather, biologists consider them arachnids, related more to scorpions and ticks than wasps and ants.
13. Dolphins and whales are not fish. : Because of their shape and aquatic habitat, people continuously mistake dolphins, whales, and porpoises as fish. As endothermic creatures with hair, mammary glands, and the ability to give birth to live young, they fully qualify as mammals – specifically, cetaceans.
14.Bats are not birds. : Due to the fact that they actually fly rather than glide, many people still adhere to the belief that bats are birds. In reality, their hair, endothermic body heating, milk production, and giving birth to live young land them squarely in the mammalian classification.
15. Never put a magnet near electronics. : According to Argonne National Laboratory – among many, many other reliable sources, of course – magnets and their accompany fields can negatively interfere with or outright damage most electronics.
16. Frozen water is capable of cracking metal containers. : State Farm Insurance offers up some great tips on preventing bursting plumbing in a home, which affects up to a quarter-million families a year in the United States alone. Even though cold contracts, the act of freezing water creates a solid with the dangerous ability to split open even metal confines.
17. A light year is not a unit of time. : Although the term “year” factors into the nomenclature, a light year actually measures extremely long distances and is used in mapping galaxies, planets, stars, and other astronomical phenomena. NASA states that light years are equivalent to about 9,500,000,000,000 kilometers and stem from how quickly a beam of light will travel in the span of a year.
18. Heat expands. : Heat causes the atoms and molecules of a substance to vibrate more, and subsequently expand as a result.
19. Cold contracts. : Boston University provides some great information on how cold contraction works when juxtaposed with heat expansion, providing all the necessary formulas to illustrate the point.
20. Antibiotics can render birth control pills ineffective. : According to the Mayo Clinic, antibiotics do have an effect on whether or not oral contraceptives work – however, their true risk has been a bit overblown. Those on low doses especially need to consider alternate forms of preventing pregnancy, though it is a wise idea for any woman on birth control pills to do so if antibiotics are needed. Rifampin has already been proven to negate their efficiency.