C All evidence points to the fact that Mars once had flowing water, but numerous flybys, orbiters and landers have confirmed one undeniable fact -— any liquid (液体的) water that was once on its surface is now long gone.One idea, the Mars Ocean Hypothesis, suggests that Mars not only...
The Martian day, or “sol,” is approximately 24 hours, 39 minutes, and 35 seconds. Mars has polar caps like Earth, containing frozen carbon dioxide and a small amount of water, too. Mars once had flowing water, and it’s possible it may have had a blue sky in its early history. M...
Photographic evidence suggests that liquid water once existed in great quantity on the surface of Mars. Two types of flow features are seen: runoff channels and outflow channels. Runoff channels are found in the southern highlands. These flow features are extensive systems—sometimes hundreds of kil...
Evidence of flowing water has been found on Mars. Images sent back by NASA's Mars Reconnaissance Orbiter (MRO) spacecraft reveal dark streaks on sandy slopes on the Red Planet that scientists believe are made by flowing water. The streaks are probably made by brine that runs down steep ...
are dried-up beds of long-gone rivers that once carried rainfall on Mars from the mountains down into the valleys. Runoff channels on Mars speak of a time 4 billion years ago (the age of the Martian highlands), when the atmosphere was thicker, the surface warmer, and liquid water ...
○Although some researchers claim that Mars may once have had oceans, others dispute this, pointing to an absence of evidence or offering alternative interpretations of evidence. ○Various types of images have been used to demonstrate that most of Martian surface contains evidence of flowing water....
The distraction has proved fruitful. Rovers and landers have gathered mountains of evidence that Mars once hostedflowing liquid waterwith the right chemistry to support life. That’s a strong signthat the planet also once had a thicker, warmer atmosphere. But today, the Martian atmosphere is ...
Running Water on MarsDirections: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express that ...
They're are thought to have been formed by flowing water on Mars. NASA/JPL/University of Arizona Liquid water is essential for life, including microbial life. At least that's the case here on Earth and presumably, the same goes for arid Mars. That's the assumption that governed NASA's...
【题目】NAS A scientists hav e foun d evidenc e o f flowing water on Mars. T his opens up the possibility o f an d wonders w e can't begin t o imagine. T h e undoubtedly is an astonish ing achievement.W e may b e ercite d by th e thought o f living things on another,...