Planet Earth: Missing Chromium Is Clue to Planet Formation

Early in the formation of Earth, some forms of the element chromium separated and disappeared deep into the planet's core, a new study...Read More

Water Was Present During Birth of Earth, Study of Silver Suggests

Tiny variations in the isotopic composition of silver in meteorites and Earth rocks are helping scientists put together a timetable of how our planet was assembled beginning 4.568 billion years ago. ... Full Story