The trans-Neptunian object Altjira, 44 times farther from the Sun than Earth is, could be the second known trinary, ...

Greenland's ice is melting, opening new sea routes and yielding easier access to prized natural resources, writes Fred Hewett. The island has become a bellwether of global disruption driven by climate ...

Microbial communities feeding on geothermal methane seeps beneath the Antarctic ice sheet could resemble life-supporting ...