I remember teaching a high school English class on Friday afternoon. Since it was Friday, they were allowed to pick and analyze songs on the Internet. One girl selected a tearjerker entitled “Why Tears Fall.” At the end of this discussion, one of the boys piped up, “I know why tears fall — gravity!” Although
Recently I wrote about how the best place for finding alien life might be an exoplanet’s moon. But there is a flip side — what if we decide we don’t want alien life to find us? Contacting us first means they assuredly have the more-advanced technology. Maybe much more advanced. Would they be friendly? And
If you are a science fan, you know many people are going to great lengths to find life on other planets. And there are plenty of candidates. So far, we have found about 1600 planets of various sizes, with an estimated 100 billion planets thought to be in our Milky Way galaxy. But are planets
Have you ever wondered how fish in a school synchronize their movements perfectly while swimming? According to the April-May 2016 issue of the Nature Conservancy Magazine (page 12), a 2013 study from biologist Iain Couzin’s labs at Princeton University and the Max Planck Institutes in Germany shows that schooling fish respond quickly to movements of
Something I ran across last week — March 30 was the birthday of the pencil eraser! According to a Writers’ Almanac entry on that date — “On this day in 1858, Hymen Lipman of Philadelphia patented the first pencil to have an attached eraser. The eraser-tipped pencil is still something of an American phenomenon; most European pencils
If the world seems especially grim right now, let me report some good news. You may have heard of the Guinea worm, a particularly painful parasite with an unusual lifecycle. It’s responsible for the disease dracunculiasis, which historically has sickened about 3.5 million people a year across 20 African and Asian countries. For the
Think Death Valley and you think desert, with an average rainfall less than two inches per year. Yet the ecosystem is surprisingly diverse, even including wildflowers. And in a year of above-average rainfall, the desert can spring to life with such a profusion of flowers it’s known as a superbloom. Seeds can lie dormant for long periods.
The world’s population is expected to reach 9 billion by 2050. That’s 2 billion more than we have today. How will we feed them? National Geographic magazine ran an eight-month series of articles on this subject beginning in May 2014. With some people going hungry now, it’s going to take some creative thinking to accommodate
Scientists still talk about gravity as a theory because they can’t explain exactly how it works. Albert Einstein hypothesized gravity waves, but there was no way to confirm they existed… until recently. Granted, the science is a bit hard to comprehend because all the numbers are extreme one way or another, but basically, over a billion years ago
On March 20, I had written about our early spring. Today I learned (from the same source, EarthSky News) that this is the earliest Easter until 2035. This is their explanation — Easter falls on the first Sunday after the first full moon in a Northern Hemisphere spring. By ecclesiastical rules, which fixes the
