Merge: combine, join, affiliate, and amalgamate
Flow features are extensive systems―sometimes hundreds of kilometers in total length―of interconnecting, twisting channels that seem to merge into larger, wider channels
Outflow channels are probably relics of catastrophic flooding on Mars long ago
Miniature: small-scale, mini; tiny, little, small
The onrushing water arising from these flash floods likely also formed the odd teardrop-shaped “islands” (resembling the miniature versions seen in the wet sand of our beaches at low tide) that have been found on the plains close to the ends of the outflow channels
Hint (noun): clue, tip, and sign
Aside from some small-scale gullies (channels) found since2000, which are inconclusive, astronomers have no direct evidence for liquid water anywhere on the surface of Mars today, and the amount of water vapor in the Martian atmosphere is tiny. Yet even setting aside the unproven hints of ancient oceans, the extent of the past. Where did all the water go?
Persuasively: convincingly
He persuasively argued that such an ice-free corridor did not exist until much later, when the continental ice began its final retreat
Prior to: before, preceding
This route would have enabled humans to enter southern areas of the Americans prior to the melting of the continental glaciers
Vast: major, expansive, broad, and massive
Vast areas along the coast may have been deglaciated beginning around 16,000 years ago, possibly providing a coastal corridor for the movement of plants, animals, and humans sometime between 13,000 and 14,000 years ago
Inhospitable: unwelcoming, unfriendly, unsociable, and unsuitable
This is the time period in which most scientists formerly believed the area to be inhospitable for humans
Impetus: incentive, motivation
Because of the barrier of ice to the east, the Pacific Ocean to the west, and populated areas to the north, there may have been a greater impetus for people to move in a southerly direction
قرمز باشین
علاقه مندی ها (Bookmarks)