The Senate evaluates threats while Elon Musk unveils a company to research opportunities with artificial intelligence
SCIENCE | A scientific startup wants to revive extinct animals
Jordan J. Ballor | The moral hazards of synthetic human embryos
A technology that fuses mixed plastics could revolutionize recycling, but questions remain about its economic feasibility
SCIENCE | A common bacteria could help shrink tumors
As NASA chugs along with missions to the moon and beyond, experts weigh in on the international frenzy to explore space
