karakylya (23)in #undefined • 7 years agoWhy too much sleep could be bad for your healthSleeping longer than the recommended seven or eight hours a night has been linked with a higher risk of premature…karakylya (23)in #undefined • 7 years agoNew solar sailing technology for NASAResearchers is taking solar sailing to the next level with advanced photonic materials. This new class of materials…
