Quote (HyphyIll @ 13 Feb 2015 01:36)
The question was how much sleep do you need to avoid feeling tired
Not what is optimal for health and longevity.
Still applies
Quote (Ovaltitty @ 13 Feb 2015 04:57)
Falling and rising with the sun... Wtf?? During winter the sun could set ~5-6pm depending on location and time zones, and rise at 7-8 am etc.
Read again
Quote (Serria @ 13 Feb 2015 00:46)
Literally as much as you need. But to be more scientific falling and rising with sun is probably the most sufficient way unless it varies a lot.