103 votes
Accepted

Could people perceive the color blue in ancient times?

If Homer talks about the dark-wine sea, it seems he also talks about the "blue eyebrows of Poseidon". You can read here about Homer's colorful descriptions that helped orators remember the verses of ...
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  • 2,945
89 votes

Could people perceive the color blue in ancient times?

The first claim is based on the research of Berlin and Kay "Basic Color Terms", which posits the hypothesis that languages evolve colour terms in the following order, and therefore that ancient ...
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  • 18k
89 votes
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Does milk make your bones stronger?

A summary of recent evidence suggests: In children with initial low calcium intake, an increase in milk/dairy intake is associated with an increase in bone density. In adults, milk/dairy consumption ...
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  • 4,929
66 votes
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Is this André the Giant's hand holding a can of beer?

Yes, that's Andre's hand. This image was part of the cover spread for a biographical article "To the Giant among us" in Sports Illustrated in 1981. The full cover spread includes regular-sized hands ...
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  • 12.7k
66 votes
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Did The Lancet publish an account of a woman who did not age?

It seems that we don't know, but probably not. What we have here is a notable person claiming without a reference that a peer reviewed journal supposedly reported on what many might consider a miracle....
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  • 3,854
63 votes
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Did the study mentioned by "The virginity fraud" TEDx Talk happen?

See Genital Anatomy in Pregnant Adolescents: “Normal” Does Not Mean “Nothing Happened” Pediatrics, January 2004, volume 113, pages e67-e69. METHODS The purpose of this study was to summarize the ...
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  • 96.4k
61 votes

Can venomous snakes be determined by these pupil, nostril and scale patterns?

No, this is not true. Not even for just India, as Indian cobra (Naja naja) has round pupils and subcaudal (tail) scales are divided. There is also no pit visible. It is venomous species of snake. ...
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59 votes
Accepted

Does frequent sex cause vaginas to become permanently stretched?

No. Here are excerpts from an article written for Psychology Today The Rare Truth About "Tight" and "Loose" Women Post published by Michael Castleman M.A. on Sep 16, 2011 in All About Sex ...
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  • 1,561
58 votes
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Are blue light filters, not blue lights, on phones and computer screens harmful to sleep?

This is the study itself if you want to read it. Yes it is a study in mice. It is evidence but not proof that blue filters are counter-productive, at least according to the authors of this single, ...
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  • 7,049
56 votes
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Does vegetarian sweat smell better?

"Smell" is a sense that is said to be more directly tied to emotional processing in the brain than other senses. But all interpretations of sensory information is subject to subjectivity. And smell is ...
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55 votes
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Do people carry around up to 20 lbs (9 kg) of poop?

No. According to the chapter "Carbohydrate Metabolism in the Colon" in Human Colonic Bacteria (1995) : The large intestine contains about 220 g wet weight of contents (range circa 60–900 g),...
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  • 96.4k
36 votes

Do people carry around up to 20 lbs (9 kg) of poop?

Those Ads were popular on TV years ago. They all claim some permanent build-up of "extra poop" which only a cleanse can remove. I found a lovely 2018 quote from a skeptic medical office of ...
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33 votes
Accepted

Did David Blaine hold his breath for 17 minutes?

Yes. David Blaine was recognized by Guiness as setting the world record for static apnea with O₂ in 2008. He held that record for several months. Blaine set the record on the Oprah Winfrey Show; a ...
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  • 14.9k
33 votes

Is there a point of no return when starving to death?

tl;dr: Yes, there is a point at which recovery is not possible without significant medical intervention. Death by starvation is not simply a matter of running out of energy to sustain life, so cannot ...
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32 votes

Could people perceive the color blue in ancient times?

Ancient Hebrew has the word תכלת for blue (or more specifically, azure), as attested to in the Bible: Numbers 15:38: Speak to the children of Israel and you shall say to them that they shall make for ...
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30 votes
Accepted

Did an experiment show none of 680 Air Force cadets were of "average" size?

This story is sourced to Tyler Blake, professor CSU Northridge. The story is printed in Advances in Human-computer Interaction (1995) at page 94, and the reference for the story is given as Blake,...
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  • 96.4k
28 votes
Accepted

Can a camera flash blind the eyes of a baby?

Snopes lists it as unproven. http://m.snopes.com/camera-flash-blind-baby/ The Daily Mail pointed to the unreliable People’s Daily Online as the source of this information, who in turn sourced ...
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  • 9,396
28 votes

If one man is shot in the head while holding a gun to another man, can the former get a shot off on the latter?

Yes, it is possible for one to get a shot off after being shot in the head oneself. Here are two different examples, both involving cab drivers being shot in the head and still returning fire. For the ...
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  • 96.4k
27 votes

Are women physically weaker?

Grip Strength When testing grip strength, a median young adult man is stronger than about 98%+ of young adult women. Even the top fraction of female athletes as a population are only slightly ...
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  • 9,396
27 votes
Accepted

Does sleeping naked in a sleeping bag keep you warmer?

No It's a system Consider the clothes and the sleeping bag to comprise a "sleeping system"... The functional demand on a sleeping system is to enable the user to obtain a specified period ...
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  • 14.9k
26 votes

Can venomous snakes be determined by these pupil, nostril and scale patterns?

... maybe a bit more education hurts even less... but the answer is still no. So to me the description with pits and slit pupils (and also the head drawing) looks like indicating pit vipers. I don't ...
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25 votes
Accepted

Is the comeback of measles in the US "largely due to anti-vaxers?"

The answer depends a lot on what mechanism you imply and who you consider to be "anti-vaxxers". If you consider anti-vaxxers to be all groups of people who as a group oppose vaccination (e.g. for ...
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  • 1,975
25 votes
Accepted

Does it take two weeks for a single man to produce enough sperm to impregnate every fertile woman on Earth?

Theoretically that is rough-ballpark-correct. But that is assuming that you would need only one sperm per woman, which is unrealistic. Using the... erm... "normal" way, not every sperm finds its way ...
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  • 18.8k
24 votes
Accepted

Does defecating while sitting cause more strain than squatting?

Normal defecation is initiated by three components (1) spontaneous phasic contractions of rectum starting during filling. (2) smooth muscle relaxation of the anal canal with an increased recto-anal ...
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  • 22.4k
23 votes

Can venomous snakes be determined by these pupil, nostril and scale patterns?

That is a diagram for identifying pit vipers. There are many, many venomous snakes in the world, including I believe all of the most deadly ones, that are not pit vipers. The advice is particularly ...
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  • 1,604
22 votes

Can black people, on average, jump higher than white people?

According to Relationship between vertical jump and maximal power output of legs and arms: Effects of ethnicity and sport Scandinavian Journal of Medicine & Science in Sports Volume 25, April 2015,...
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  • 96.4k
22 votes
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Is any unconscious person capable of full splits?

No. The claim, that "when unconscious, we are all capable of full splits", is not supported by evidence. There is not a great deal of literature on this topic. One paper on a similar topic “...
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  • 1,489
18 votes
Accepted

Do pregnant women "glow"?

Pregnancy can cause skin to darken in the face, nipples, and even in a line from the belly button to the pubic region. This darkening can sometimes be referred to as a "glow", similar to someone with ...
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  • 196
18 votes

Can the explosion of a pressure cooker kill you?

To say the explosion can't kill you seems a bit exaggerated. In this case, Elderly woman has leg horrifically severed after home pressure cooker exploded, a woman died after the explosion of a ...
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