Scientists now believe that Mars had at least 2 billion years worth of volcanic activity, making it home to the oldest known volcanoes in the solar system. The finding is based on a thorough study of a Martian meteorite found in Algeria in 2012. Known as Northwest Africa 7635 (NWA 7635)...
Scientists have long believed that Mars was wet around three billion years ago and then lost much of its water. But a new study presents evidence of water activity from about 700 million years ago, posing a new puzzle about Mars and its history for scientists to crack in their future studie...
根据文章第一段Butanewstudypresentsevidenceofwateractivityfromabout700millionyearsago,posinganewpuzzleaboutMarsanditshistoryforscientiststocrackintheirfuturestudies.(但是一项新的研究提出了大约7亿年前水活动的证据,为科学家在未来的研究中___火星及其历史提出了一个新的难题。)可知crack的意思是"解决"。A.Keep保持...
“We've been able to confirm that the ground water system we've discovered dates from around 3.5 billion years ago,but we don't know how the basins dried up.”(“这是个大问题”,Salese说。“我们已经确认我们发现的地下水系统,可以追溯到35亿年前,但我们不知道盆地是如何干涸的。”),可知不...
What was it like when human beings transformed the Earth? What was it like when humans first arose on planet Earth? What was it like when mammals appeared and thrived? What was it like when life on Earth became complex? What was it like when oxygen killed almost all life on Earth...
Did Mars experience a greenhouse effect around 4 billion years ago?Editage Insights
Honestly, I think it would be very hard to determine whether we have any real biosignatures, even on return samples from [the rover] Perseverance. Any life that existed 3 billion years ago would likely just be bacterial, and you don’t build up fossils...
history. This ancient impact scar has a diameter of about 150 kilometers (90 miles) and lies close to where the cratered highlands drop off onto the northern lowlands in Elysium. Based on its size and state of preservation, scientists estimate Gale formed 3.8 to 3.5 billion years ago. ...
Mars has has a very primitive form of plate tectonics, and the action of two plates past each other began splitting the surface some 3.5 billion years ago. That set the stage for the formation of the Valles Marineris. Sources:https://solarsystem.nasa.gov/planets/mars/overview/,https://nssd...
Roughly 4 billion years ago Mars had an oxygen rich atmosphere. Source: sci-news.com, Image: pixabay 10 Sunsets are blue on Mars. Source: wikipedia, Image: wikipedia 9 The reason Mars is red is because it is covered in rust (iron oxide). Source: space.com, Image: wikipedia 8 Mar...