50 Things We Know Now (That We Didn’t Know This Time Last Year) 2006 Edition
12. A sex gene responsible for making embryos male and forming the testes is also produced by the brain region targeted by Parkinson’s disease, a discovery that may explain why more men than women develop the degenerative disorder.
13. Ancient humans from Asia may have entered the Americas following an ocean highway made of dense kelp.
14. An impact crater 18 miles in diameter was found 12,500 feet under the Indian Ocean.