What is the highest point on Earth?

This seems like an easy question. It is at the top of Mount Everest, of course. But is it that simple? It depends on how you define highest. If you mean the height above sea level, then yes, that is the correct answer. But the Earth is not a perfect sphere. It bulges at the equator, making it what we call an oblate spheroid. So if we define tallest by the distance from the center of the Earth, then we have to also take into account the fact that sea level near the equator is ‘higher’ than at points away from the equator.
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New species found under the Antarctic

That evolution shapes the nature of organisms depending on their environment is well known. But we may think that we have explored pretty much all the Earth and thus encountered all the variety that exists. So it is interesting when previously unknown regions of the Earth that have vastly different environments from those we are familiar with reveal new kinds of organisms.
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“Where is my flying car?” may soon no longer be a joke

Some of you may remember the animated TV show The Jetsons about a family that lived in the future that had all manner of anticipated technological advances. One of them was the flying personal car and that particular item has become a punch line whenever people want to express disappointment that we do not have many of the amazing things that we thought had been promised to us in the dreams of science fiction writers.
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The problems with self-driving vehicles

Now that self-driving vehicles (SDVs) are becoming a reality, people are paying close attention to accident reports involving them. In almost all the cases, it appears that it was an error by the human in the other car that caused the accident. Here is a compilation of dash-cam videos taken from SDVs as they avoid accidents, some of which required quick reactions.


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Puzzling things about the Invisible Man

Some of you may have read H. G. Wells’s novel The Invisible Man. There have been several films based on it that I have not seen but as a young boy, I was fascinated by a TV show that was based on the same idea but is set in modern times and is otherwise nothing like the book. In this show, as in the book, a scientific experiment gone wrong makes a man completely invisible, so he goes around wearing clothes, gloves, sunglasses, hat and with his face fully bandaged in order to keep his invisibility secret and make his presence visible and not freak people out.
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How to make people believe you have psychic powers

Following yesterday’s post about whether all mentalists are frauds, two commenters Acolyte of Sagan and RationalismRules recommended that I watch Derren Brown’s 2004 45-minute TV special Messiah and I did so last night. It was quite fascinating. I had not heard of Brown before but his Wikipedia page says that he is a British performer who uses “magic, suggestion, psychology, misdirection and showmanship” to achieve his effects that convince his audiences that he has psychic and other supernatural powers though he himself explicitly denies that he has. The page also says that he uses “traditional magic/conjuring techniques, memory techniques, hypnosis, body language reading, cognitive psychology, cold reading and psychological, subliminal (specifically the use of PWA – “perception without awareness”) and ideomotor suggestion.”
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Are all mentalists frauds?

As readers know, I do not believe that supernatural forces exist because there has been no convincing evidence for them. Hence things like psychic phenomena must have some natural explanation, even if we cannot provide one for every case that people present to us. As I discussed in an earlier post, Ian Rowland, who does ‘psychic’ readings for people by using cold reading techniques, says that trying to provide explanations for the various phenomena that believers challenge you with is a mug’s game because when someone supposedly tells you of some astounding thing that happened to them or that they heard of from someone else, such accounts are utterly unreliable because people in general are hopeless at observing events and later remembering and describing them, coupled with the fact that they tend to subtly simplify the story to conform to their beliefs. Magicians know that their biggest allies in deception are the audience members who will deceive themselves about what they saw and later claim features of the trick that did not happen.
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