Yes, there are various Heathen religions, including Forn Sed, Asatru, Theodish, and others. They all generally refer to themselves as branches of Heathenry.
Norse gods
Yes.
Yes.
Yes, and some of us still do. It's called Asatru.
There are still some that do, but not many.http://www.bbc.com/news/magazine-22972610http://bigthink.com/ideafeed/iceland-to-officially-worship-norse-gods-again
They are uncounted.
I'm not sure but it would be nice if Jews, Christians and Muslims around the world added up to less than those worshiping Norse gods. The world would be a better place to live.
Yes, some people do still believe in the Greek Gods, although their worship is not as widespread as it once was.
The Aesir were the main Norse gods, consisting of all the well known gods such as Thor and Odin. The Vanir were nature and fertility gods, and they were not as well respected in Norse mythology. In the way of worship, the Norse people believed their gods were more like mighty beings deserving great respect than they were actual gods. In fact, the Norse believed that their gods could actually die! Due to this, neither the Aesir or the Vanir were actually worshiped, at least not they way most other cultures worshiped their gods, they were just respected, asked for guidance, and sometimes prayed to for help. Both of the races in the Norse Pantheon were treated the same way by the Norse people, although, as I said, the Aesir were slightly more respected.
Of course! You can learn about it in colleges or books. Now if you're asking about people still believing/worshiping the Norse Gods/Goddess it is very small in numbers in cults.
Yes Chinese people do worship many gods
the people of sumer practiced polytheism the worship of many gods