Today I post interesting facts 51-75. These last weeks have been incredibly intense, and it’s been tough meeting my 100 fact challenge celebrating reaching 100 posts. I will follow with the last 25 later this week or next Monday. The blog has had to take a backseat to work and to my book writing efforts; I will hit 70,000 words tomorrow and I am closing in on the finish. And without further ado, more facts!

51. Earth’s magnetic poles switch every few hundred thousand years, as a result of natural movements in iron in the crust. I wondered how this might affect migratory species using magnetic senses, but there isn’t enough evidence from the last switch 41,000 years ago to tell.

52. The creator of Kellogg’s cornflakes was at war with sexuality. The cornflakes were a part of this, as an unstimulating food. He was a strong advocate against masturbation– advocating circumcision and application of acid to the genitals.

53. Left-handed people are at a higher risk for numerous ailments, including schizophrenia, ADHD, and depression. I am what they call mixed-handed– I do some tasks with my right hand (writing), and some with the other (sports).

54. Eta Carinae is sometimes one of the brightest stars in the sky, and sometimes not. It is a system including a luminous blue variable, which grows a coat of obscuring gas, and then periodically blasts it off. In 1843, it was the second brightest object in the sky. It currently cannot be seen with the naked eye.

55. George Washington did not have wooden teeth. His dentures were made of gold, hippopotamus ivory, lead, and human and animal teeth (including horse and donkey teeth).

56. Goldfish actually have memories of about three months. As anyone who ever owned a goldfish should know.

57. Alfred Tennyson was troubled and interested by the science of his time. Themes about evolution and references to the contemporary phrase “ontogeny recapitulates phylogeny” (a since debunked scientific concept which claims an organism develops in vitro according to its phylum order) can be found in his poetry, specially In Memoriam.

58. Water-induced wrinkles are not caused by the skin absorbing water and swelling. They are caused by the autonomic nervous system, which triggers localized vasoconstriction in response to wet skin, yielding a wrinkled appearance. This may have evolved because it gives ancestral primates a better grip in slippery, wet environments.

59. Eating nuts, popcorn, or seeds does not increase the risk of diverticulitis.These foods may actually have a protective effect.

60. The Coriolis effect does not determine the direction that water rotates in a bathtub drain or a flushing toilet. The Coriolis effect induced by the Earth’s daily rotation is too small to affect the direction of water in a typical bathtub drain. The effect becomes significant and noticeable only at large scales, such as in weather systems or oceanic currents. Other forces dominate the dynamics of water in drains.

61. Abner Doubleday did not invent baseball.

62. Nikola Tesla was a badass scientist. Thomas Edison isn’t as great as you thought. Tesla pioneered AC current distribution and the lightbulb. Edison stole ideas from Tesla and attempted to undermine him to increase his own profits.

63. Paul Erdös wrote over 1500 math papers. If you’ve heard of six degrees of Kevin Bacon, this was originally known as the Erdös number, the number of degrees of separation from publishing a paper with Erdös. He was very eccentric. For years, he lived out of his suitcase, traveling across the world and collaborating on papers. He didn’t know how to open juice containers and used amphetamines to give him energy. His epitaph was “I’ve finally stopped getting dumber.”

64. Catherine the Great was the longest-ruling female monarch in Russian history. She was actually prussian, and married Peter the Great’s grandson. She probably conspired in his assassination, and took the throne. Her son changed Peter the Great’s succession laws to exclude women from rule.

65. Marie Curie was the first woman to win a nobel prize, and the only person to win in multiple sciences. She discovered polonium and radium and x-rays. She used x-rays to help diagnose injuries in WW1. She eventually died due to radiation-related illness.

66. Ramanujan was an indian-born mathematical genius. With little formal instruction, he devised many theorems that are still being incorporated into mathematical theory. He died at 32.

67. Michael Faraday was a pioneering scientist in electromagnetism, although he also received little formal education. He discovered benzene, and discovered the relationship between light and magnetism. He knew little math beyond trigonometry. The unit of capacitance, Farad, is named after him, as well as numerous constants and devices.

68. the symbol pi, π, originally referred to the perimeter of a circle. only in 1706 was it used to mean the ratio of perimeter to diameter.

69. James Tiptree Jr., a prominent science fiction writer, was actually a woman. She wrote under the pseudonym for two decades until she killed her husband and then herself.

70. In the early years of the Soviet Union, a type of genetics besides Mendelian genetics became accepted as correct, known as Lysenkoism. In Lysenkoism, the way you raised a crop determined its outcome, not the type of seed. Widespread starvation occurred in the Soviet five-year plans, partially due to Lysenkoism.

71. There are over 20,000 species of orchids, or four times the number of mammalian species. Many of them are epiphytes, meaning they grow above the ground in tree-borne habitats.

72. East germans could only buy Trabant cars. Used Trabants were more expensive than new ones, because the waiting line was shorter.

73. A girl in Sweden survived her body temperature dropping to 55 F (13 C) in 2010.

74. Hypothermia is highly correlated to age. Older people suffer hypothermia at a much higher rate.

75. The Cape Hatteras lighthouse is the tallest base to tip lighthouse in the United States. Due to shore encroachment, it was moved in 1999. Its light can be seen 20 miles out to sea.