The remains of human space exploration are strewn across the solar system, from dozens of dead spacecraft abandoned on the moon to the comet lander Philae, declared out of contact last week.
After Alaska’s 1964 earthquake stranded salt water stickleback fish in freshwater ponds, it took just 50 years for them to evolve into happy pond dwellers.
Scientific American was founded by inventor and publisher Rufus M. Porter in 1845 as a weekly American newspaper. It is now a global brand, with 18 foreign language editions. Colleagues from around the globe joined in to say congratulations.
High costs keep patients from using stem cells harvested from umbilical cords