Long before humans figured out how to harness solar power, photosynthesizers beat us to it. Our first attempt came less than 3,000 years ago, when the ancient Greeks built magnifying glasses to concentrate light for starting fires. By then, other lifeforms had already been converting those same rays into chemical energy for upwards of 3.5 billion years. There is truly nothing new under the sun.This process, called photosynthesis, is fundamental to almost all life on Earth. Primary producers (pla ...read more
Nobody has seen the original list of the seven wonders of the ancient world. The Greek historian Herodotus and later Callimachus are purported to have created this list more than two millennia ago, but their original writings on this topic haven’t survived — we only know they included sites like the Colossus of Rhodes and the Lighthouse of Alexandria based on the writings of others later on.The only surviving wonder of these original seven that still stands is the Great Pyramid of Giza — t ...read more
When someone tells you that you need more fiber in your diet, do you immediately think of bran muffins? Not to disparage bran muffins, but you can do better than that. A diet high in fiber can be surprisingly varied and delicious. And the benefits go way beyond keeping you regular, though that is one big advantage.Dietary fiber helps lower LDL cholesterol (the so-called “bad” cholesterol), stabilizes blood sugar, and can reduce inflammation, explains Amy Bragagnini, board-certified oncology ...read more
Gasoline fuels most light-duty vehicles, such as passenger cars and pickup trucks. Heavy-duty vehicles, like buses, delivery trucks, and long-haul tractor-trailers, typically run on diesel.Both fuel types are needed because gasoline and diesel engines have different strengths. As my automotive engineering students learn, this makes them suitable for different uses.Let’s start with what they have in common. Gas and diesel engines both work through a process called internal combustion.First, the ...read more
In medieval England, “handedness” determined whether one was considered virtuous or evil. The Latin root of “left” literally meant “sinister,” and folks who favored that hand were sometimes accused of witchcraft. Now, imaging technology can tell us how favoring one hand affected bone chemistry, according to a report in PLOS ONE. Researchers used relatively new imaging techniques to analyze the bones of centuries-old skeletons from a famous shipwreck, the Mary Rose. That ship, part of ...read more
Author Vishay SinghPosted on Categories Discover Magazine