Something you probably haven’t considered recently: just how many times can a sheet of paper be folded? Conventional wisdom says about seven times, maybe eight, because the more times a sheet is folded, the thicker it gets. Once the resulting stack becomes thicker than it is long, it can no longer be folded. Consider a
What is your approach to happiness? This subject came to my attention recently thanks to the cover article in the Jan 16-23 issue of Time magazine. This special section, entitled “The Happiness Revival Guide,” includes a brief article “Catastrophizing Doesn’t Have to Be Catastrophic” by Martin Seligman, a University of Pennsylvania professor and coauthor of
The older I get, the more time becomes important. (This leads to some interesting discussions with middle school students when I think they are wasting their time, but that’s another subject.) So I was intrigued by the article “The Biggest Wastes Of Time We Regret When We Get Older” by Kristin Wong (https://getpocket.com/explore/item/the-biggest-wastes-of-time-we-regret-when-we-get-older?). It sounded
Which U.S. Presidents have won the popular vote at least three times? Of course, Franklin Delano Roosevelt holds the record for four (1932, 1936, 1940, 1944). but there have been two others: Andrew Jackson (1824 before also winning the Electoral College and becoming President in 1828 and 1832), and Grover Cleveland (becoming President in 1884,
The speed of light has always been considered the limiting factor for interstellar transportation. For example, the closest star to us is Proxima Centauri, about 4.25 light-years away. The fastest spacecraft we’ve ever been able to build is the now-in-space Parker Solar Probe, which should eventually attain a top speed of 450,000 mph. Even at that high
Good news for the environment: recently a startup company in Chile, Highly Innovative Fuels (HIF), opened its first synthetic gasoline production facility. HIF was organized to run the plant, which is a collaboration among Porsche, Siemens Energy, Exxon Mobil, Enel Green Power, the Chilean state energy company ENAP, and Empresas Gasco. The plant will begin operating
On July, 25 1976, the Viking 1 orbiter transmitted this photo from the Cydonia region of Mars. Do you see a face in the upper center? Many people did. Except the “face” was simply a play of light and shadows. Nevertheless, the public’s imagination had been captured, and it is still thought of as the
I ran across this story that I think is worth sharing. It is attributed to appellate Judge David Bazelon. A Chinese father calls his children to a family meeting and tells them that somebody has pushed the family outhouse into the Yangtse River and asks somebody to confess; nobody comes forward. The father says, “Let
Biology has posed an interesting question: Why are there two pods of orcas, or killer whales, that live off the coast of the American Northwest — one off British Columbia’s Vancouver Island and one further south off Washington State — that are of the same species but show different behaviors? The Vancouver orcas like to
It’s one of those unanswerable questions of the modern age. With so many stars in the Milky Way (not to mention all the stars in nearby galaxies) with the potential for tens of billions of planets, the odds of intelligent life existing somewhere are pretty high. Yet in all recorded history, no confirmed contact with