A SpaceX astronaut mission like no other will lift off from Kennedy Space Center on Monday night. Here's what to know.

The extent of sea ice blanketing the Arctic this winter fell to the lowest level on record, researchers announced this week, ...

During a partial solar eclipse, the moon passes between the sun and Earth. The moon casts a shadow on Earth and only partly ...

When the Chicago-size iceberg drifted away, scientists seized the opportunity to study the life and geologic formations ...