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121 votes
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Are spiders unable to hurt humans, especially very small spiders?

The answer is that spiders definitely can hurt you. While you may not be likely to be killed, spiders can absolutely hurt you, whether from a large one's bite (whether venomous or not) or from any ...
Rory Alsop's user avatar
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64 votes
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Does a pear contain 600 times more formaldehyde than a vaccine?

No. The amount of formaldehyde in 200 grams of pear is about 7 times the maximum that an infant would receive from a single vaccine, as explained below: According to Determination of formaldehyde in ...
DavePhD's user avatar
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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. ...
Reconquistador's user avatar
53 votes

Was Alexei Navalny poisoned in 2020 with Novichok nerve agents by Russia's Federal Security Service?

The poisoning incident is famous because the investigative journalism group Bellingcat identified the FSB (Russian spy service) members who followed Navalny and went into his Tomsk hotel room to apply ...
Owen Reynolds's user avatar
42 votes
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Is canthaxanthin used in salmon farming toxic to human health?

The claim is correct for: Canthaxanthin is used as a colorant in foodstuff, particularly so in farmed salmon, but also eggs and poultry Canthaxanthin does also occur naturally, in some fish, in tiny ...
LangLаngС's user avatar
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41 votes
Accepted

Was Alexei Navalny poisoned in 2020 with Novichok nerve agents by Russia's Federal Security Service?

TLDR (see conclusion below): Independent pieces of evidence from the Charité and laboratories in Sweden, Germany and France make the hypothesis that Alexei Navalny was poisoned with Novichok in 2020 ...
Maximilian Janisch's user avatar
38 votes

Does a pear contain 600 times more formaldehyde than a vaccine?

No, the maths on these memes don't quite add up, but it is fair to say that a pear does still contain quite a bit more formaldehyde than any vaccine by at least a factor of 10. According to the WHO (...
JasonR's user avatar
  • 9,277
32 votes

Is honey toxic when heated up in tea?

Let me start off with my conclusion as a chemist... I absolutely don't believe that heating honey in hot water would make the liquid indigestible or toxic. The claim The webpages cited by the OP,...
MaxW's user avatar
  • 598
32 votes

Are spiders unable to hurt humans, especially very small spiders?

The claim First let's start with noting that the goal of the episode was to get children over their irrational fear of spiders and making those children see the bigger picture. Mummy says cobwebs ...
David Mulder's user avatar
  • 4,134
29 votes

Are spiders unable to hurt humans, especially very small spiders?

Are spiders unable to hurt people? There are several species of spiders, some large, others not so large. that are quite capable of harming people. Some can cause severe injury to or kill people. ...
David Hammen's user avatar
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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 ...
cbeleites unhappy with SX's user avatar
22 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 ...
T.E.D.'s user avatar
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15 votes
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Do dolphins intentionally intoxicate themselves with puffer-fish venom?

About Rob Pilley, the "zoologist and producer" who gave the Daily news their original quotes. A google scholar search does not turn up any research from him; none of the 120 papers by a R Pilley are ...
BobTheAverage's user avatar
14 votes

Is the European NO₂ limit of 40 µg/m³ for outside air backed by strong evidence?

Summary The question as asked in the title depends on what you consider "strong evidence". I will therefore have a look at which side makes the better-sourced point. (Which is not just about "...
DevSolar's user avatar
  • 19k
12 votes
Accepted

Can defrosting vacuum-packed fish in its packaging cause botulism?

The point about botulinum toxin is that it grows best in anaerobic conditions. (Detection, Identification and Differentiation of Clostridia Species) This is typically associated with canning and other ...
thelawnet's user avatar
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11 votes
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Can you become immune to Snake Venom?

tl;dr: Yes. This Mister Steve Ludwin is quite public about his snake adventures. The details about his method as reported in the popular press are a bit murky and so imprecise that they increase the ...
LangLаngС's user avatar
  • 44.1k
11 votes
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Did a prisoner die from a needle prick when he was told that it was a snake bite?

There is a set of very old urban legends - fictional stories that are widely believed and passed around as true - which are closely related to this story. In the book The Lore of Scotland: A Guide to ...
Oddthinking's user avatar
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7 votes
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Is the Japanese emperor forbidden from eating fugu (puffer fish)?

Formerly the emperors had to stay in their palace in Kyoto and did not have the chance to visit Shimonoseki, where most fugu is prepared. More concretely, fugu was illegal in Kyoto and Tokyo from ...
Avery's user avatar
  • 46.3k
7 votes
Accepted

Does eating burnt toast neutralize ingested poison?

Activated carbon is used to treat poisonings and overdoses following oral ingestion. Tablets or capsules of activated carbon are used in many countries as an over-the-counter drug to treat diarrhea, ...
ventsyv's user avatar
  • 7,124
5 votes
Accepted

Can regularly ingesting a poison build an immunity to it?

Mithridatism is an actual practice that is possible with biologically complex poisons that react with the immune systems. The mechanism is similar to that of developing immune resistance to a disease ...
Sean Duggan's user avatar
  • 6,568
5 votes

Are spiders unable to hurt humans, especially very small spiders?

They are dangerous/harmful in more places than Australia United States Brown Recluse Necrotic venom often requiring medical attention Black Widow Female venom contains the neurotoxin latrotoxin. ...
mcalex's user avatar
  • 167
5 votes

Do the seeds from 20 apples contain a fatal dose of cyanide?

No, that estimate is far too low (you'd need seeds of 1-2 orders of magnitude more apples) The amygdalin contents of the apple seeds could gener- ate between 0.06 and 0.2 mg cyanide equivalents ...
cbeleites unhappy with SX's user avatar
4 votes

Is drinking water stored in copper vessels (copperware) good for your health?

Copper in the water is not a problem. In fact, in moderation it is necessary for your health. In the United States, a lot of homes use copper plumbing. However, the concentration of copper can be an ...
called2voyage's user avatar
3 votes

Are laundry detergent and fabric softener fumes dangerous to human health?

We don't know. When deciding if fumes are dangerous, the relevant measure is the "LC-50", the airborne concentration that is lethal to 50% of test subjects. Ingestion LD-50s are of limited ...
Mark's user avatar
  • 3,063
2 votes

Are polyfluorinated chemicals linked to men's penises being smaller?

tl;dr No direct evidence, yet. For causation, and correlational, observational studies. All are too often based on animal studies. But these preliminary and circumstantial evidence point largely to ...
LangLаngС's user avatar
  • 44.1k
2 votes
Accepted

Are laundry detergent and fabric softener fumes dangerous to human health?

Not even close to dangerous enough to worry about I looked up the Material Safety data Sheet (MSDS) for the OSHA (United States) for a generic fabric softener. The following table is the LD50 (lethal ...
GOATNine's user avatar
  • 678
1 vote

Does Asclepias gigantea cause blindness?

Yes there can be a varying degree of vision loss, but it is only temporary. From the Indian Journal of Ophthalmology. 2009 May-Jun; 57(3): 232–234. A retrospective analysis of 29 patients who ...
Nav's user avatar
  • 599

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