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Jun
5
comment Do humans have skin cells that trigger oxytocin release in the brain?
to clarify - are hairs involved in triggering those fibers? For example, would a person who undergone laser hair removal feel the same as a hairy person?
Apr
2
comment Is it possible for a human to wake up in a wrong way?
Good find, I especially appreciate the up to 4 hour timing information. This may also interact with caffeine, which is frequently consumed in the morning. Apparently caffine half-life is about 5.7 hours (caffeineinformer.com/the-half-life-of-caffeine)
Jan
27
comment What is the biological basis of “energy” that extraverted humans draw from social engagements and introverts expend?
Another observation: Both extraverts and introverts would be fatigued by an extended "sit here and listen to me talk" kind of meeting that runs for 2 hours.
Jan
27
comment What is the biological basis of “energy” that extraverted humans draw from social engagements and introverts expend?
A completely anecdotal observation: extraverted people are more physically active in social situations and use more gestures/movement. They would be moving more than introverted people (who are more likely to just sit and listen), thus extraverts may benefit from improved blood circulation, thus sustaining higher levels of engagement for longer. An introvert who's engaged in an interesting conversation moves/gestures just as much as an ordinary extravert, and thus feels less fatigue from social situations.
Dec
11
comment Are there specific features of birds that cats/small predators are attracted to?
Thanks for a great answer!
Dec
1
comment Is recognizing one's own mirror reflection a valid test of animal intelligence/self awareness?
The sticky note on head is a good experiment, I will try it!
Nov
22
comment Are there specific features of birds that cats/small predators are attracted to?
My cat ignores the last pointer but loves to play with a real dark red cranberry. Red might be a clue
Oct
24
comment Do male animals visually perceive females as more/less attractive?
I added the link
Oct
24
comment Do you produce more sperm after 1 week of abstinence vs 1 year of abstinence
Excess/old sperm is broken down (by phages?) and is re absorbed in the body
Oct
24
comment Do male animals visually perceive females as more/less attractive?
Those articles mention 2 examples of bird visual preference: a) better diet translates into more plumage pigment in some birds b) parasites dull the color of certain parts of plumage
Sep
16
comment Help identify this awesome climbing plant with velcro like stem
Thanks for the description. The plant never had a chance to flower and is mostly dead now. I will dispose of the rest of it.
Aug
17
comment What light intensity starts melatonin release in humans?
Not looking for a new answer, just want to award bounty for the great answer already posted
Aug
17
comment What light intensity starts melatonin release in humans?
Ps. Different numbers for melatonin sensitivity (ex: starting at 420) are because the eye somehow changes the light, thus pure melanopsin responds to less wavelength than through the eye
Aug
17
comment What light intensity starts melatonin release in humans?
This is probably the best answer I've ever received here:) starting a bounty so you can claim it!
Aug
17
comment Are there specific features of birds that cats/small predators are attracted to?
Texture might be a part of it. Cat responded with surprise to a still piece of artificial fur. It seems the cat knew that fur might be an animal.
Aug
17
comment Is there a hormone combination that makes humans grumpy?
I've seen anecdotal evidence suggesting that "low dopamine" contributes to irritability
May
12
comment Are there special constants in biology that define organism's morphology?
To give context to the question: I'm interested if there are some numerical patterns to gene expression during organism's development.
Mar
26
comment Are there specific features of birds that cats/small predators are attracted to?
Movement is definitely part of it. I noticed that my cat likes to chase dried cranberry more than a similar sized plastic ball or a rock. The cranberry bounces in a different way, or maybe it's the seeds rattling inside.
Mar
10
comment Why do we dream?
A couple comments: about 75% of dreaming occurs in REM, but REM is not a requirement for dreaming. The term for conscious control of dreaming is "lucid dreaming", and potentially "dream incubation" for intentionally dreaming about a certain thing
Aug
7
comment Is there a preferred sleeping position for humans?
By head direction I meant compass orientation like north or east