Everyday matter is made up of protons, neutrons, electrons, and something called electron neutrinos. These particles interact with each other via one or more of four forces: gravity, electromagnetic (which is the unified force of electricity and magnetism), strong nuclear, and weak nuclear. Almost all of everyday life could be explained pretty well with just this short list of four particles and four forces. [Read more…]
Today is the spring equinox, which is one of two times in the year when the Sun is exactly above the Equator and day and night are of equal length all over the Earth. (The word equinox is Latin for equal night.) But if you look at the times of sunrise and sunset today, you will see that we actually have 12 hours and nine minutes of daylight. You have to go back to March 16 or 17 to get closest to exactly 12 hours. [Read more…]
Around the time of reports last year about the discovery of the Higgs particle at the LHC (Large Hadron Collider), reader Anthony in a private email to me asked a good question. The Higgs particle is repeatedly referred to as the means by which all other particles get their mass. If not for the Higgs, elementary particles like the electron, muon, and the like would be massless and like all massless particles would be zipping around at the speed of light. At present, there is no explanation for why these particles have mass at all let alone the actual values that they do have. According to current theory, it is the Higgs phenomenon that gives all the other particles their mass. So how does that happen? [Read more…]
Some of you may have heard about the acrimonious exchange that occurred last year between David Albert and Lawrence Krauss. I did not write about it at that time but now there is an even more unfortunate sequel to that story. What follows is a brief summary of what happened earlier so that you can understand the recent development that I address at the end. [Read more…]
The transitive property says that if A beats B and B beats C, then one would expect A to beat C. This seems quite obviously true and we use it in some form all the time. It is true for the real numbers where we think of ‘beats’ as ‘is greater than’ but is this transitive property true for all meanings of ‘beats’? Via Cory Doctorow, I came across this video of something called ‘Grime Dice’ that not only violate the transitive property (which is surprising in itself) but do so in very interesting ways. [Read more…]
In yesterday’s Part 1 of this three-part series, I wrote about how in debating sophisticated religious people, atheists have the disadvantage in that science impacts religion in many ways and that atheists, even if they are scientists, cannot know about all developments everywhere and so can be blindsided by arguments based on science that they have little knowledge about. I have labeled this the ‘Craig Con’, in contrast to the older and cruder ‘Gish Gallop’, because some theologians are now more sophisticated than the ones who came before and use information from cutting-edge science to give the same old and tired arguments for god a patina of freshness and credibility. William Lane Craig is the smoothest practitioner of this debating tactic, though by no means the only one. [Read more…]
I was both intrigued and disturbed by the recent report of a plan called Inspiration Mars to send a human couple on a flyby of Mars in the year 2018, approaching the planet within 100 miles. The venture will be an entirely private one backed by a group known as the Inspiration Mars Foundation whose chair is Dennis Tito, who in 2001 became the first private person to go into space. They will of course draw on the vast expertise of NASA. Interestingly the only permission one needs to get is from the Federal Aviation Administration, which regulates all spacecraft launches and returns. [Read more…]
My previous post on an effort to debunk homeopathy triggered a memory that I had written about this topic some years ago and this sketch from That Mitchell and Webb Look. [Read more…]
Deepak Gupta (under no circumstances could you, or should you, confuse him with the notorious Deepak Chopra!) is based in India and is the founder of the website Savvy Skeptic. He is in the process of raising funds to distribute and market a documentary that debunks homeopathy, a practice that has quite a following in India. [Read more…]
3D printing is the hot new thing. I have not used one myself but a colleague of mine says that the cost of such things is dropping rapidly (you can now get one for less than $1000) and he has several in his lab because the cost of repairing the older, more expensive ones is now often greater than the cost of buying a newer and better one. He says that they come in extremely useful for creating customized items for his research. [Read more…]