Recent content by Ndaren

How can the relativistic mass not contribute to gravity? The observer will see the planets as having very large momentum/kinetic energy, which will contribute to the stress-energy tensor, and therefore to gravity (as this paper implies: http://arxiv.org/PS_cache/gr-qc/pdf/9909/9909014v1.pdf)...

Suppose an observer flies through our solar system at ##v \approx c## relative to the Sun, such that he sees each planet's (and the sun's) mass as greatly increased. What happens to the orbits of the planets? Since he sees the center of mass of the solar system as flying past him at ##v \approx...

I thought it was generally known and accepted that men are often obliged to help women with the more physically demanding aspects of daily life (e.g. moving furniture, carrying heavy loads, etc.) and industry (e.g. logging, construction), and hence that paleolithic women may also have had...

To be totally clear, when I said self-sufficient in that case, what I meant was I don't think that an isolated paleolithic group of women would make a robust survival unit, or at least they wouldn't fare as well as a similar group of males. I am simply generalizing from my experiences and...

Haha, I definitely don't doubt that's part of the story. However, it doesn't explain why most women are so weak - too weak to be self-sufficient in the wild, let alone hunt large creatures, or so it seems to me as a woman who frequently attempts weight training (although I'm assuming they've...

Caloric intake doesn't directly effect the duration for which one can hunt, in the short term. But a lower caloric requirement would certainly be desirable anyways, if it were feasible. However, in order to be effective hunters at all, men needed to have a certain amount of strength, which...

Physiologically, men are stronger than women because they have more muscle mass, which is because they have much more of the hormone testosterone. But the evolutionary reason for this is that humans are social animals who have always lived in groups. Hence, rather than each individual being...