-Index of recent reviews . Request a copy if interested. Just send the Number.
Earlier index is also available. A mind once stretched never returns back to its original size.
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How can this thing possibly work?
-- 2576 - Alexis Echo - how does it work? - Your Amazon Echo ($100 at Amazon) is perfect for helping you out with tasks around the house, like turning on your lights, playing music and finding your keys. The smart speaker has a horde of unusual tricks that range from pleasantly offbeat to downright disturbing.
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- 2577 - UNIVERSE - What is the universe made of? Beyond-the-Standard-Model theories have not yet successfully predicted any new experimental phenomenon or any experimental discrepancy. After five decades, far from requiring an upgrade, the Standard Model is worthy of celebration as the Absolutely Amazing Theory of Almost Everything.
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- 2578 - ASTRONOMY - astronomical changes were small last year? With an 13.8 billion year lifetime so far, the Universe has certainly been around for some time. While it may seem to change only imperceptibly on human timescales, the fact remains that these changes are real, important, and cumulative. If we look closely and precisely enough, we can observe these changes on timescales as small as a single year.
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- 2579 - UNIVERSE - how its age was determined? Once you figure out that the Universe is expanding, all you need to do is measure the expansion rate today and use the laws of physics to determine how the expansion rate must have changed over time. Then you calculate how long it would take to get back to the Big Bang where it all started. This is a high school physics problem once these measurements are made.
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- 2580 - QUANTUM RANDOMNESS - Photons and Quasars? The nature of free will has long inspired philosophical debates, but it also raises a central question about the fundamental nature of the universe. Is the cosmos governed by strict physical laws that determine its fate from the big bang until the end of time? Or do the laws of nature sometimes allow for things to happen at random?
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- 2581 - NUMBERS - how to deal with large numbers? You use exponents. Like the square of the number 4 is 4^2. The two is the exponent. This review shows how exponent are used in astronomy to deal with large numbers.
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- 2582 - EXOPLANET - that is like Earth? - January, 2020 astronomers revealed a series of new discoveries made by NASA’s Transiting Exoplanet Survey Satellite (TESS). The telescope has spotted a number of strange new exoplanets circling star systems. One is particularly Earthlike. It would be the greatest discoveries of mankind if life was discovered on another planet.
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- 2583 - ASTRONOMY - puzzles we still need to solve.? The Universe is expanding at an ever accelerating rate due to a vacuum energy in space that we can not identify. In order to have the effect of gravity everywhere the same, there must be 10 times more mass than we can identify. Whatever is causing it the Universe will end cold, black, with empty space being the winner.
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- 2584 - MANAGEMENT - how to manage your time? To effectively manage time is to effectively manage life itself. You need congruity and balance to prioritize and make good decisions. Everyone has choices to make. Choices are always decisions. And, not making a choice and not acting on it is a decision too.
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- 2585 - ATOMS - massless particles control the Universe? Massless particles are the smallest particles that we can think of. What could they possible have to do with astronomy? These massless particles are completely stable they do not lose their energy decaying into pairs of less massive particles. Because all their energy is kinetic, they always travel at the speed of light. Traveling at the speed of light don't actually age. A photon is actually not aging relative to us. It is timeless.
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- 2586 - METEORITE - the oldest meteorite? A meteorite that crashed into rural southeastern Australia in a fireball in 1969 contained the oldest material ever found on Earth, stardust that predated the formation of our solar system by billions of years.Reviews
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