What did scientists believe caused the richat structure when it was viewed from space by the first astronauts? what do scientist now believe created this landform?

First, it was thought that it was the result of a meteor impact, but today it´s believed to have been caused by a process of geological uplift and later erosion from wind and water.

Explanation:

Also known as the Eye of Africa, the Richat structure is located in Mauritania. It´s composed of concentric bands that are made of resistant quartzite rocks form ridges, and valleys of less-resistant rock.

It has a diameter of 50 km and is one of the geological formations that are better perceived from space than from the ground, and it was a recognisable landmark to astronauts since their first missions.

explanation: we can only guess at how our actions may be perceived in the future. doing something really big like killing lots of people, saving lots of people, affecting the lives of lots of people is a sure fire way of being remembered in historical records. we can also make a difference in the history records by being a small influence on something bigger, whether that is as a civil servant, scientist or artist.

of course you could argue that we all affect history just as tiny cogs in a   bigger machine.

if you mean how do people influence our opinions of things which have already happened, then simply by writing a book which looks at things form a different perspective and trying to convince people that this perspective is more accurate or truthful. people do it all the time i.e. richard the third was a terrible or was he? plenty would disagree, it's just that their views aren't the most widely known.n:

detente translated to english means politics