harshly (18)in #undefined • 6 years agoSolar sails for NASAResearchers is taking solar sailing to the next level with advanced photonic materials. This new class of materials…harshly (18)in #news • 6 years agoEn route to the optical nuclear clockThe nucleus of thorium-229 possesses a property that is unique among all known nuclides: It should be possible to…