Linked Questions

3
votes
2answers
693 views

Why don't we keep evolving until we are super-human? [duplicate]

Humans (homo sapiens) have been on the earth for thousands of generations, and we have kept evolving throughout that time. Why don't we just keep evolving so that, let's say, we live for an average of ...
4
votes
0answers
92 views

Why do people die? [duplicate]

what is the reason people die naturally even though they have no known disease? I see people become physically weak at times they get old and die eventually in case they are not attacked by any known ...
1
vote
0answers
67 views

What is the evolutionary advantage to a lifespan limit? [duplicate]

How/Why Do Koi have a lifespan of hundreds of years? Do humans have a lifespan of decades? Do dogs have such a short lifespan? Within these questions I pose further questions. How does size relate ...
36
votes
7answers
12k views

Is evolution a fact? [closed]

Richard Dawkins in one of his videos says that Evolution is a fact and not just a theory. He goes on to say that man and chimpanzees both evolve from apes. Is this correct (Is evolution a fact and ...
20
votes
4answers
2k views

What evolutionary explanations are there for death?

I know death and cancer doesn't hurt humans' reproductive success. It's not helping either. Why do we die? Why dying humans (all of us) are common? What's the point of dying?
25
votes
3answers
4k views

Do all organisms have to die?

I understand (a little) that there are biological clocks and reason that after a certain amount of time organisms die. I'm wondering if that is something inherent in our DNA or in biology/chemistry in ...
12
votes
5answers
2k views

Why has grey hair evolved?

A vast majority of humans get at least some grey hair as they age. As far as I know this applies to both genders and all races. Presumably this means that at least some grey haired humans have ...
8
votes
4answers
16k views

Bad Eyesight and Evolution

Why do many humans have bad eyesight, such as near-sightedness, which hampers performance in a wide variety of tasks? Shouldn't there be evolutionary pressure towards better eyesight?
3
votes
1answer
7k views

Cell evolution: immortality vs reproduction

Many sci fi movies produce interesting ideas and technologies that we seem to be able to realize in real life at some point. "Lucy" was not one of those movies. But Morgan Freeman's speech in the ...
1
vote
1answer
916 views

Does the second law of thermodynamics cause aging? [closed]

What is the current understanding as to why organisms age and die? In the following explanation on Ask an Engineer, entropy is not even considered (despite it being answered by an engineer). Unless ...
2
votes
1answer
752 views

Any examples of an organism's life cycle where the reproductive stage occur before the 'adult' stage?

Most life cycles we knew of consist of a juvenile stage (e.g. larval for insects, sporozoite for some intracellular parasites), a reproductive stage and an adult stage. Usually the reproductive stage ...
2
votes
2answers
441 views

Do couples having children later in life act as an evolutionary mechanism?

Ok, this may be just wild nonsense and I have to warn that my knowledge on the subject is limited. I was reading about how in some countries people choose to have children later in life. After that ...
0
votes
1answer
347 views

Why do we die of old age? [closed]

Not sure where to ask this question and thought this would the best place. I am not after any opinion or theological, philosophical answers. I am after the science or biology research, experiments or ...
4
votes
1answer
335 views

Why do athletes see a dip in performance in their thirties?

I have noticed a lot of athletes hit their prime when they are in their 20s and that by the time they reach their 30s they are past it and start to decline. Great athletes tend to prolong their ...
3
votes
1answer
309 views

Senescence, immortality and evolution?

Many have heard about the fabled "immortal" jellyfish, Turritopsis dohrnii, which doesn't die from aging (senescence) and can revert the aging process indefinitely. It is rather remarkable that only ...

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