A strong tropical depression picking up moisture from the warm ocean caused widespread flooding in the Hawaiian islands.

Let the moon introduce you to the constellation Taurus the Bull on the nights of March 18, 19 and 20, 2021!

SETI's Nathalie Cabrol believes a widespread biosphere exists on Mars that has migrated underground over the past few billion years.

NASA's Perseverance rover on Mars has just sent back its first initial science results, as well as some new audio recordings of wind and the rover's laser zapping rocks.

Earlier studies have suggested the possibility that Earth was once covered with water. New evidence - focused on Earth's mantle - suggests our planet was a true water world, covered by a global ocean, billions of years ago.

New research solves a decades-long riddle: from where do the highest-energy cosmic rays originate? Even supernovae - exploding stars - can't explain them. Now it seems these sorts of cosmic rays may come from clusters of young, hot, massive stars.

A new study suggests that climate change is the key driver of changes in water flow in rivers worldwide.

Scientists have confirmed the presence of water and organic materials that are essential for life on the surface of asteroid Itokawa. The samples of rock and dust were returned to Earth by the Japanese Hayabusa spacecraft in 2010.

A new animation illustrates how Antarctica was linked to its ancient neighbors – today’s Australia, India and South Africa – as part of the ancient Gondwana supercontinent.

One of the largest groups of 17-year cicadas, Brood X, last emerged from underground in 2004. The next generation will begin arriving in April 2021.