Planetary scientists analyzing oxygen isotopes in lunar soil from the Apollo mission sites conclude that meteorite bombardment over 4 billion years could only have delivered a tiny fraction of Earth’s ...

New research suggests Earth’s water came from sources other than meteorites, challenging long-standing theories on planetary ...

NASA research using Apollo lunar regolith data refines the Moon’s impact record and places limits on meteorite contributions to Earth’s water over geologic time.

Exhaust from lunar landers drifts across the moon and contaminates ultra-cold polar craters that are rich in ancient ice and ...

Earlier research held that meteorite impacts from the solar system's early days were a major source of Earth's water.

How nutrients from Europa's icy shell reach its ocean has been unclear despite several theories.