Biology is a natural science concerned with the study of life and living organisms, including their structure, function, growth, origin, evolution, distribution, and taxonomy.

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Is spitting good or bad for your health? [closed]

Is spitting good or bad for a person's health? Its definitely bad for others around you/ A general search on my part has shown both good & bad effects but that's mostly not cited information ...
16
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1answer
14k views

Is CPH4 from Lucy real?

In the science-fiction film Lucy, the titular character takes a drug called CPH4 that increases her brain capacity. The writer and director of the film, Luc Besson, claims in several interviews that ...
16
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1answer
1k views

Did David Blaine hold his breath for 17 minutes?

David Blaine (born David Blaine White; April 4, 1973) is an American magician, illusionist and endurance artist. He is best known for his high-profile feats of endurance, and has made his name as a ...
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4answers
5k views

Is the O-type blood used as a universal donor?

In biology classes at school I was taught that O can be a donor to all blood types (given matching Rh group and other details), and AB can receive transfusion from any type. Quick googling seems to ...
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1answer
422 views

Does drinking coffee reduce breast size?

A study of 300 women done in the UK says that drinking 3 cups of coffee per day can cause a woman's breasts to shrink by an average of 17%. drinking three or more cups a day was enough to cause a ...
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0answers
272 views

Determining your ancestry through the shape of your feet?

This picture makes its rounds around blogs & forums recently: Does it have any scientific backing?
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1answer
538 views

Does sleeping naked in a sleeping bag keep you warmer?

The most popular question on outdoors.SE is Is it warmer to sleep naked in a sleeping bag? Now, all the answers over there are not properly researched and it was suggested in one of the ...
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1answer
268 views

Can a woman get pregnant after only one instance of intercourse? [closed]

A lot of people believe that a woman can get pregnant the first time she has intercourse. Is this true?
13
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1answer
458 views

Are men more likely to be LGBT than women?

According to this article gay men exceed lesbians as a proportion of the population, and this study suggests that there are more male-to-female transgenders than female to male transgenders. Yet, a ...
4
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1answer
194 views

Are humans the only species to have permanently enlarged breast?

According to this didyouknowblog (http://didyouknowblog.com/) humans are the only species to have permanently enlarged breast. It quotes an article from the Guardinan ...
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0answers
217 views

Does sniffing rosemary improve memory?

A "meme" now circulating on Facebook claims that Scientists Find Sniffing Rosemary Can Increase memory by 75% The credited web site, www.herbs-info.com has this article on the topic, which in ...
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415 views

Does drinking water or milk after eating fish, watermelon, muskmelon or corn cause any kind of harmful effects?

This question is about a myth popular in India and involves biology. I have a poor knowledge of biology, but I can understand chemistry up to school level. Also my English is not so good, so please ...
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1answer
801 views

Have scientists successfully cloned a dinosaur?

An article makes a claim that scientists have cloned a baby Apatosaurus. From Article: Scientists at Liverpool’s John Moore University have successfully cloned a dinosaur, a spokesman from the ...
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68 views

Do plastic bags of water deter flies? [duplicate]

Today I had lunch in a small Mexican taco place, and they had hanging, in the middle of the room, two clear plastic bags filled with water: I asked the reason for the hanging bags of water, and was ...
4
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2answers
347 views

Do roaches die (naturally) on their backs? [closed]

First, a major qualifier here; by naturally, I mean not forced to die on its "stomach" (like by being stepped on). Secondly, I live in the U.S., so maybe this applies to only American roaches. ...
2
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1answer
144 views

Is the chemical composition of genetically modified crops tested?

A February 2002 Harper's Magazine article, Unraveling the DNA Myth discusses the fact that the effect that genes have on plants is not always as simple as one gene coding for one protein, and that ...
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230 views

Is it possible for ingested dsRNA (or other genetic materials) to affect human gene expression?

I am usually pretty skeptical about claims on the danger of genetically modified crops because the issue of health for me logically breaks down to: Do the genes altered produce toxic chemicals in a ...
3
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1answer
276 views

Are 75% of cells in the human body non-human? [duplicate]

A recent issue of the Swiss popular science magazine "Beobachter Natur" contains an article about microbes in which the following claims are made: 75% of the cells in our body are non-human, however ...
16
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1answer
701 views

Are tears structurally or chemically different depending on the reason for crying?

An artist named Rose-Lynn Fisher has made photos of human tear drops under a microscope, and shows them to be different in their structure depending on how those tears were generated. Sad tears have a ...
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0answers
148 views

What is the mainstream position of biologists and anthropologists on the issue of human race? [closed]

Race is perhaps one of the most controversial and sensitive issues in anthropology, biology, and other related fields. As a non-scientist, I've used google to probe the disparity between the positions ...
3
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0answers
85 views

Does stress make you age faster? [closed]

So we know that excess cortisol can damage the hippocampus (through a direct mechanism), and we also know that stress can reduce the length of telomeres (though we don't seem to know the mechanism of ...
5
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1answer
550 views

Is the video of Soviet Dog Revival Experiment real?

In this video a dog head is brought back to life by injecting blood and air artificially. The dog (it's head actually) reacted to sound, touch and used its toungue to taste. I am not skeptic about ...
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0answers
1k views

Did Todd Standing video a sasquatch? [closed]

Recently on Survivorman, Les Stroud went on a Bigfoot expedition. Towards the end of the episode he showed footage provided by Todd Standing with a very clear picture of what appears to be a juvenile ...
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2answers
339 views

Does potassium deficiency cause cramps?

According to Ace Fitness, it is a myth that potassium deficiency doesn't cause cramps, since there isn't enough potassium in sweat to deplete potassium. Sodium deficiency is blamed instead. Is this ...
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1answer
541 views

Are birds magnetically repelled from high-voltage power lines?

There is a board game from the 90's called 'Mind Trap' in which players must solve tough riddles. One of the riddles goes like this: Sid Shady claimed that he developed a special insulation for ...
6
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1answer
198 views

Does carrageenan cause gastrointestinal inflammation and higher rates of intestinal lesions, ulcerations, and even malignant tumors in humans?

I came across this article on how to avoid carrageenan on a friend's facebook post. The "article" starts with this statement: Carrageenan is a common food additive extracted from red seaweed. ...
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1answer
622 views

Is the inside of a field cucumber 20 degrees Fahrenheit cooler than its surroundings?

I've heard this claim before, but every time I dig deeper I am unable to find a reason for why cucumbers would be significantly colder than their surroundings. Is there any validity to this claim? ...
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1answer
443 views

Do pain killers “target” pain?

Everyday I hear advertisements that some painkiller directly targets the pain. e.g. Nurofen's UK web-site Targets pain fast. [...] Targets pain twice as fast as standard ibuprofen ...
16
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1answer
421 views

Does red meat increase the risk of heart disease?

Conventional common wisdom has been that red meat consumption increases the risk of developing heart disease. There are a lot of studies indicating this may be true, but there are also a lot of ...
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3answers
288 views

Do vitamins improve memory abilities?

Some people claim that taking vitamin can improve your memory. For example, Memory Improvement Tips: Everyone has heard there are vitamins and supplements that can improve your memory and other ...
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0answers
67 views

Does research into genetical differences increase or decrease public prejudice? [closed]

I've come across this question in different fields. Gender & race being the most controvercial but also things like hair color and left or righthandedness. When proper research is done, does it ...
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368 views

Do fleas jump lower after being covered by lid? If so, do their offspring adjust to this lower height?

This is one of the popular experiments mentioned in motivational books. Here is summary from a motivational webpage: At the beginning of the experiment a number of fleas are placed in a jar. The ...
3
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1answer
405 views

Are the origins of Rh- blood unexplained by science?

Researcher Daniel Wilks claims: Blood type O is a universal blood type. Blood types are further broken down into two groups, negative and positive. This is called the RH factor. The RH factor is ...
10
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1answer
804 views

Did cows in Germany blow up their own barn by farting?

As reported by Reuters, Flatulent cows start fire at German dairy farm - police Methane gas from 90 flatulent cows exploded in a German farm shed on Monday, damaging the roof and injuring one of ...
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1answer
320 views

Did human speech suddenly develop out of nowhere?

Did human speech suddenly develop out of nowhere as claimed in this video? Is it true that our evolutionary ancestors had none of these speech attributes?
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1answer
639 views

Was there a last common ancestral species between humans and chimpanzees?

Wikipedia: Human Evolution states that humans and chimpanzees are related in an evolutionary sense. The caption to this picture from Wikipedia says The hominoids are descendants of a common ...
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1answer
394 views

Does everybody have almost same brain-waves while they're thinking about the same thing?

Do people have almost same brain-waves (Waves that captured by EEG) while they are thinking the same thing (For example thinking about an Apple)? To put it another way, are there patterns in measured ...
5
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1answer
504 views

Can humans “feel” the earth's magnetic field?

Someone told me that human cells can somehow feel the earth's magnetic field. The same guy thought that centrioles are probably involved. Is it true? If not, would it be true for stronger magnetic ...
6
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1answer
409 views

Do humans sleep better in darkness?

Do humans (and I guess also most creatures) sleep better in darkness?
3
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1answer
534 views

Are oranges actually green? [closed]

On an episode of Qi there was a 'fact' that claimed oranges aren't actually orange they are green and they lose their green colour in transport and become orange. Now I was indeed skeptical about ...
11
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1answer
404 views

Does animal experimentation delay results in medical research?

There is currently a vehement debate in the Italian media about animal rights activism and experimentation on animals. Caterina S., a person with four genetic diseases, publicly demonstrated her ...
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102 views

Is homosexuality primarily genetic? [duplicate]

It seems to me that, evolutionarily speaking, the fitness of a purely homosexual animal or human is much lower than that of a heterosexual one, and therefore would be strongly selected against. Thus I ...
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587 views

Does natural selection have less impact on modern humans?

This question is motivated by two other questions that hinged on this one but did not explicitly ask the question. Is intelligence declining due to the lack of selection pressure? Is human evolution ...
20
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1answer
5k views

Are all the atoms in our bodies replaced on a regular basis?

In a related question, Are all cells of the human body completely replaced every seven to ten years?, it is explained that there are cells in the human body, like neurons, that are never replaced. ...
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0answers
30 views

When and how does the consumption of fluoride cause health problems? [duplicate]

I have heard about orally consuming fluoride and rinsing with a solution containing fluoride to help prevent cavities, but I've also heard some claims that fluoride is bad for peoples' health. What ...
8
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1answer
987 views

Are these “necropants” trousers made from human skin?

The Museum of Icelandic Sorcery & Witchcraft in Holmavik allegedly holds a pair of 17th century Icelandic trousers, made from a corpse. Warning, the image in the article is not for the faint of ...
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1answer
305 views

Is scientific racism a pseudoscience? [duplicate]

In Wikipedia, in the list of pseudoscientific topics included the following "pseudosciences": Scientific racism, Aryanism and Melanin theory. While it is quite evident that Aryanism and Melanin ...
30
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1answer
4k views

Can you punch someone's nose into their brain?

A persistent tale in martial arts is that one can strike an unfortunate other on the nose in such a way that you drive the cartilege up into their brain. Is this possible? I think some points to ...
9
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1answer
1k views

Does raw cows' milk contain lactase?

Raw milk advocates seem to claim one of two things regarding the lactase enzyme (not to be confused with the lactose sugar): That raw milk contains lactase which is destroyed in the pasteurisation ...
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1answer
1k views

Does a full grown oak tree expel 7 tons of water from its leaves in a day?

There are a couple sites with this claim but I can't find any reliable sources... http://www.snapple.com/real-facts/cap-view/715 ...