“Why did we humans evolve such big brains, making us the unrivalled rulers of the world?” asks this article in New Scientist.
28 Sep 09 – Planning a trip to Mars? Take plenty of shielding. According to sensors on NASA’s ACE (Advanced Composition Explorer) spacecraft, galactic cosmic rays have just hit a Space Age high.
21 Jul 09 – Reader J.T. Tregidga wonders what I think of Dr. Paul LaViolette’s Galactic Core Explosion theory.