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.
Astrophysicists offer a possible explanation for why dark matter seems to behave differently in the Milky Way.
The implications for human reproduction beyond Earth are unclear.