Coronavirus germs live in people’s throats and mouths. When someone (23) has the coronavirus coughs or sneezes or breathes out, the germs come (24) their mouth in tiny drops of water.
Though you can’t see the germs, you can sometimes see these tiny drops. In cold weather, they make a cloud of steam! So if someone else (25) breathes in the air with the coronavirus germs in it, they would probably get the illness.
It’s easy (26) the coronavirus germs from inside your body on your hands when you touch your nose or your mouth. If the person with the coronavirus germs on their hands (27) a door, the invisible germs can live on the handle for hours. When someone else opens the door, they get the germs on their hands, too. And if they touch their nose or mouth, the germs can get into their body.
So you can also catch the coronavirus by touching things that someone with the virus has already touched.

There is one planet that still fascinates and teases scientists mainly because it doesn’t have an atmosphere to obscure observation, yet it is not big enough for sufficiently accurate telescopic observation. The fact that it is also very close to the sun also makes it difficult for astronomers.
However, space telescopes have told US a lot more about Mercury. It is rather similar to Earth’s moon and to Mars. There are mountainous areas dotted with craters and large valleys which are uncratered. The moon’s valleys have fewer cracks and ridges are smoother. Mercury’s valleys are filled with volcanic rocks, similar to on the moon, yet there is no evidence of volcanoes, even extinct ones, on Mercury, as there is on the both Mars and the moon, and of course here on Earth.
So, scientists presume the valleys on Mercury were caused by different things, that is to say not by volcanoes, but by very large meteorites, which also caused the cracks in the terrain and left the ridges rough and uneven. More and better photos of Mercury are needed to prove what are at present at best only hypotheses.