To build a sustainable presence off Earth, humans will first have to answer some tricky questions about basic biology.
Launched in 1977, the twin probes will likely outlive the sun. Find out what star systems they’ll meet as they head deeper into the galaxy.
The researchers said they have no idea what's causing these time-reversed gamma-ray signals, but they added that the physics around black holes are so strange that nothing can be ruled out.
Scientists have shown that young dogs respond to this way of talking, and that it may help them learn words