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"Live a good life. If there are gods and they are just, they will not care how devout you have been, but will welcome you based on the values you have lived by. If there are gods, but unjust, then you should not want to worship them. If there are no gods, then you will be gone, but will have lived a noble life that will live on in the memory of your loved ones. I am not afraid."

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Jun
27
revised Why does hair turn grey or white, and why does it happen later for some?
updated and corrected
Jun
27
answered variation in expression accounted for a SNP — what's a usual percent?
Jun
27
answered Why does hair turn grey or white, and why does it happen later for some?
Jun
26
accepted Why do we grow so much hair on our heads compared to our bodies?
Jun
26
comment Could inhibition of progerin formation slow the rate at which a body ages?
@nico thanks - clarified in my post.
Jun
26
revised Could inhibition of progerin formation slow the rate at which a body ages?
clarified meaning as per nico's comment
Jun
26
comment Is Homo sapiens the only species capable of prioritization?
I think this is a tough question - how could you tell? Many animals are seemingly capable of 'planning' their lives (for instance mating and rearing offspring at the right time, keeping them fed, safe from predators, etc, might seem to have taken some planning) but that is not to say they do any such thing. I would have thought it's all instinct, but I look forward to any answers!
Jun
25
comment Could inhibition of progerin formation slow the rate at which a body ages?
A catalyst to what, and what pathway? If you mean aging, there is no 'aging pathway'
Jun
25
revised Could inhibition of progerin formation slow the rate at which a body ages?
actually the effect size isn't bad - changed my mind. But the significance is still nowehere near genome-wide.
Jun
25
comment Why do only only two sexes exist for animals?
I think the OP is likely asking why mammals only have 2 sexes. This is quite different to asking why we don't spontaneously change sex (as you quite rightly point out, the physiological changes required are too much). But what you don't touch upon is why there are no examples of 3 sexes, for instance, in mammals (that I know of) - I think this would then be a very complete answer.
Jun
25
answered Could inhibition of progerin formation slow the rate at which a body ages?
Jun
25
comment Why do we grow so much hair on our heads compared to our bodies?
Interesting! May we have kept hair on our heads to keep the sun from directly heating our brains? Bit off topic, but do you suppose the increased endurance running is simply that running on 2 legs is more efficient than using all 4?
Jun
20
comment When has an organism evolved enough to be called a new species?
Not a problem, as you say there is no definitive way to draw the line between species, but the line is much easier to draw in animals like a horse. Yours should be the 'correct' answer for this, as the title to the question is not about horses, but species as a rule (the horses were just an example). But therein lies the problem - using one definition (the 'classical' definition?) we can distinguish between 2 closely related animals, but this same definition is not adequate for other organisms. Is it possible to clarify your answer to include separate definitions for plants/animals/bateria?
Jun
20
comment When has an organism evolved enough to be called a new species?
That being said, yours is a very interesting and informative answer. But it does not really answer the question. If you were to test whether the horses had sufficiently divereged to become 2 new species, would the test not be to see if they could successfully breed?
Jun
20
comment When has an organism evolved enough to be called a new species?
So you're saying that it is incorrect to say that the horses are no longer the same species when they can no longer successfully breed (successfully here meaning 'producing fertile offspring'), as stated in my answer? I would say this is 'correct', even if it is a simplification. If the example had been bacteria (that do not 'breed' per se) then I would not have given this definition.
Jun
20
comment Are there examples of the green beard effect in humans?
Could you expand you question to make it more accessible to users, and thus easier to answer? What 'samples' are you interested in? Do you have an example? Thanks.
Jun
20
comment Why Didn't Evolution Cause the Human Body to become Streamlined?
I agree - @shigeta's comment does essentially answer the question. The reason we're not as streamlined as fish is that we don't need to be!
Jun
20
answered When has an organism evolved enough to be called a new species?
Jun
18
comment What happens when cells in your body run out of telomeres?
do you have a link to the study that 'knocks out' the telomeres and finds the cells to not have any adverse affects? As I understood it the cells either enter a state of permanent cell-cycle arrest (senescence) or apoptose (programmed cell death) when they reach their Hayflick limit (i.e. when their telomeres run out).
Jun
18
answered Do we get 1/4 of our genes from each grandparent?