Astronomers using the Hubble Space Telescope have stumbled on a rare and surprising find: A very distant spiral galaxy, swirling billions of light years away, which formed at a time when such spiral galaxies were thought to be nonexistent. Researchers say it’s an astounding discovery — partly because it raises some questions about prevailing theories of galaxy formation.
Invisible, cold dark matter plays a major role in the evolution of galaxies, according to modern cosmological theory. The most advanced simulations of cosmic evolution show stringy tendrils of mass — dark matter — connecting giant clusters of galaxies via a vast cosmic web. Now for the first time, astronomers have been able to detect one of these filaments, sussing out its location by watching it warp light.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.