sorry i have no idea
Some people have been to Mars and Venus.
By the Middle Ages the Vikings were no longer invading.
The best advice I have is to look it upon Google. It will take some time but, you'll find out the answers:P
The Vikings were an energetic seafaring people. They traveled the Norwegian Sea and the Baltic Sea.
Some people believe that Vikings traveled to Oklahoma due to reports of Norse artifacts and structures found in the region, such as the "Heavener Runestone," which features inscriptions resembling Old Norse. Additionally, the idea is fueled by theories suggesting that Vikings explored North America beyond the well-documented areas like Newfoundland. These claims, however, are often met with skepticism from historians and archaeologists, who argue that evidence is insufficient to confirm Viking presence in Oklahoma.
Vikings traveled in boats that were able to travel the Atlantic Ocean yet handle shallow water. This allowed the Vikings to raid and pillage villages in Britain, Ireland and the European coastline. They also walked and some rode horses.
There is no particular reason: some planets have more mass than others.
We have not found a good reason that some sort of living thing could not live on Mars. There is water, and the surface of Mars is certainly warm enough. But, no living things have been detected yet on Mars by the several rovers that we have sent to Mars' surface.
I know Vikings 1 and 2 have. Also, some ships that have been there are: Mariner 4, Mariner 9, Pathfinder and Global Surveyor.
Mars
Yes, there are meteorites on Mars that have hit the planet's surface. These meteorites are pieces of rock or metal from space that have traveled through space before crashing onto Mars. They provide valuable information about Mars' geology and history.
There is no reason why a form of life doesn't exist on Mars. If life can exist in the very hot thermal vents deep in the earth's oceans, then why life in some form can't exist on another planet in some form?