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> Dr. Ying-Hui Fu, a human geneticist and neuroscientist at the University of California, San Francisco, is part of a team that has found genetic mutations in short sleepers.

> Unfortunately, she says, if it's not in your genes, you're out of luck.

I'm going to have to trust the doctor on this one...

But... but... but... <anecdote>!

but how would I find out if I'm a carrier of this mutation??

I mean sometimes for days on end I can do with 4hrs of sleep and then there are times I look like death with 4hrs...

The "heritability of sleep duration" appears to be 30/40%, so there is a meaningful contribution from genetic variation.

For citations, google the quoted portion.

Which app would that be ? sleepyti.me ?

I used to use that, didn't work for me. I use: http://www.azumio.com/apps/sleep-time/