Plate tectonics and mantle plumes set the lifespan of volcanic islands like Hawaii and the Galapagos.
When a hot plume of rock rises through the Earth's mantle to puncture the overlying crust, it can create not only a volcanic ocean island, but also a swell in the ocean floor hundreds to thousands of kilometers long.
What happens after a heavy comet meal?
- A comet produces and unexpected explosive ejection of ice, dust, and gas.
- NASA's TESS satellites captures the whole thing by accident.
- The "burp" may have left a crater 65 feet across. That's quite a burp.
As this map of Bouguer's gravity anomaly shows, the pull of the earth varies considerably by region.
NASA's intrepid Curiosity rolls upward into Mars history.
- Curiosity is exploring an exposed cross-section of Mars' early history within the unusual Gale Crater.
- Intriguing salt deposits indicate briny bodies of water appearing and disappearing over time.
- Curiosity is digging through Mar's past in search of environments that could have supported microscopic life.
An unexpectedly revealing find in Mongolia solves a longstanding riddle.
- Normal geological evidence isn't precise enough to confirm paleontologists' suspicions.
- The new fossils find is covered by a fine veneer of red sand deposited in a single season.
- Scientists can infer whose eggs they were.