Two finger-sized pieces of stone drilled from a basalt rock are the first bits of Mars ready to be brought to Earth.
Humans are changing the world in profound ways. Some scientists think those changes have launched a new epoch in Earth’s history: the Anthropocene.
Tiny bdelloid rotifers awake from a 24,000-year slumber when freed from the Arctic permafrost.
These rotating threads of dark matter and galaxies stretch millions of light-years. Scientists want to know how their spin begins.
The asteroid collision initially reduced the diversity in what had been sunny tropical rainforests. In time, the forests would become permanently darker.
Diamond retains its structure even at extreme pressures, which could reveal how carbon behaves in the cores of some exoplanets.
Most pinpoints that light the night sky are raging infernos we call stars. As adults, many will create new elements that they later cast off into the cosmos.
The bubbles have different colors, based on how the gas inside them moves. That could give clues to how the bubbles developed.
A forest flourished within 1,000 kilometers of the South Pole. That was a while ago, as in millions of years ago.