Our coverage sheds light on the boundless darkness, the physical violence and the mysterious, awesome reaches of our universe. We ponder how it all began and about our place in the cosmos: Are we alone? Is there life on other planets? Will interplanetary travel save the human race? We also explore space through images, videos and illustration.
New research suggests the interstellar interlopers may indicate the presence of a vast number of as yet undetected giant exoplanets.
Planet K2-18b is about twice as wide as Earth and located about 110 light-years away.
Other researchers dispute whether astronauts would experience the type of radiation used in the experiment.
Test of mining prowess of microbes lifted off yesterday.