| Drought reveals a lost Spanish Stonehenge | | | The Dolmen of Guadalperal - sometimes called the Spanish Stonehenge - is a 7,000-year-old circle of 150 upright stones, now back on dry land in western Spain after 50 years underwater. It was first unearthed and studied in the 1920s. The 1963 construction of the Valdecañas Dam flooded this region of western Spain, submerging it. Now, after a hot and dry summer in Europe, the monument is fully exposed again. "When we saw it, we were completely thrilled, said Angel Castaño, president of a group trying to preserve it. "It felt like we had discovered a megalithic monument ourselves." Read more. | | |
| Using 3-D models in the search for Mars life | | | Maps are handy for travel. But what if you're traveling to a place never before visited? For the ExoMars mission, due to launch next summer, scientists used data from Mars orbiters to create 3-D models of the region to be explored. This region - called Oxia Planum - might even contain an old river delta. Who knows what we'll find there? Read more. | | |
| IAU names the 2nd interstellar visitor | | | The first known interstellar visitor received the official name 'Oumuamua, meaning scout. This one has a less romantic name and one that sets a standard for future discoveries: 2I/Borisov. Read more. | | |
