成人快手

Archaeological evidence from Kostenki in Russia suggests that early modern humans moved out of Africa to the east and north, and reached the eastern plains of Russia around 45,000 years ago. The genome of the parasite Trichomonas vaginalis has been sequenced which might help diagnose and treat the condition which affects millions of women. Astrobiologists ask if life could have started on Earth more than once. New backpack design based on how bamboo poles are used in Asia to spread heavy loads.