Six things to know about NASA's Opportunity Mars rover

After 15 years, the mission of NASA's Opportunity rover has come to an end, but its successes on Mars have earned it a spot in the robot hall of fame. Here's what you need to know about our intrepid Martian overachiever:

Death near the shoreline, not life on land

Our understanding of when the very first animals started living on land is helped by identifying trace fossils—the tracks and trails left by ancient animals—in sedimentary rocks that were deposited on the continents.

Injection wells can induce earthquakes miles away from the well

A study of earthquakes induced by injecting fluids deep underground has revealed surprising patterns, suggesting that current recommendations for hydraulic fracturing, wastewater disposal, and geothermal wells may need to ...

Cretaceous snails conceal themselves in monuments in Madrid

The fountains standing next to the Museo del Prado are built using a sedimentary rock full of gastropod shells from the time of the dinosaurs. These fossils have revealed the origin of the stone: forgotten quarries in Redueña, ...

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