Ice sheets, and not rushing rivers, sculpted many Martian valleys, according to scientists. The new research suggests ancient Mars wasn’t as warm and wet as we thought, but an expert we spoke to remains unconvinced.
A 4. 5 magnitude earthquake has been reported by the USGSapproximately 8 km NW of Perry, Oklahoma. 207 people reported feeling the earthquake to USGS with weak shaking reported from Tulsa to Oklahoma City. A 4. 2 mag earthquake was reported 8 km NW of Perry, Oklahoma around 10:15 om 6/20/20 (Courtesy: USGS) The epicenter was estimated to be 8 km NW of Perry with a focus depth of 7. 9 km. A 4. 2 mag earthquake was reported 8 km NW of Perry, Oklahoma around 10:15 om 6/20/20 (Courtesy: USGS)
In Waterworld, climate change melts the polar ice caps to drown Earth's continents in water. That's impossible, but a new study proposes Earth was once covered by a global ocean. Researchers found evidence that few to no landmasses existed 3.2 billion years ago. This suggests life emerged in the ocean, not freshwater ecosystems on land.