Answer:
I suck at this and I am going to be as good as Emmalei50 but...
Norse
1.Sif is the wife of Thor. She is associated with the earth and harvest.
She is known for her golden hair.
2. Frigg is the wife of Odin, the mother of Baldr, and the step-mother of Thor. She is associated with foreknowledge, wisdom, love, and marriage.
She is also the goddess of spinning. She is associated with weaving the clouds and the threads of fate.
The name "Friday" comes from "Frigg's day".
3.‘Bifrost’ is the bridge separating Midgard (the realm of humans) from Asgard (the realm of the Gods).
It is made from 3 colors (red, blue and green) and is the only way to enter Asgard.
4. In Norse mythology, there’s an apocalyptic battle at the end of time called ‘Ragnarok’.
This is a battle between the Gods and giants. It almost destroys all life forms and leaves the 9 other worlds in a slaughtered state.
5. Loki gave birth to an 8-legged horse named Sleipnir after mating with a stallion.
He disguised himself as a mare on heat and mated with a stallion named Svaðilfari, and their offspring became the best horse among Gods and men.
Greek
1. The saying, “Taking the bull by its horns”, comes from Greek mythology. It was one of the 12 labors of Hercules that he had to perform to repent for killing his own wife and children in a fit of madness caused by Hera. He saved the city of Crete from a raging bull by seizing its horns.
2. Delphinius was the dolphin form of Apollo which was worshiped at Delphi. This is strange because Delphi is in the mountains away from the sea but apparently, Apollo in his dolphin form jumped up on the deck of a ship and commandeered it to the coast at Delphi. According to the Greek mythology, the sailors became the first priests there.
3. Kronos was the yougest titan.
4. Chaos is the almighty, not Zeus, not anyone but Chaos.
5. Greek myths end in tradegy
6. Pandora was the first mortal women:
Pandora was made by Zeus and was the first mortal woman according to Greek mythology. She received a gift from each of the Gods to make her perfect. Zeus gave her to Epimetheus who had been warned by his brother Prometheus to not take any gifts from Zeus but he got enchanted by Pandora’s beauty and accepted. He gave her a box and told her never to open it. But she couldn’t resist and opened it, letting out all evil and mistrust in the world.
7. Atlas was punished to hold the heavens not the Earth:
Atlas was a Titan who fought and led a battle of Titans against Zeus but got defeated and was punished by Zeus to hold up heavens on his shoulders for all eternity. For a while he got Hercules to hold it up for him but then later resumed his duties when Hercules cheated him into holding the weight of the heavens again. He is wrongly portrayed to be holding up the earth.
8. Hades was technically an Olympian but not counted as one:
Hades was as powerful as any of the other twelve Olympians which technically made him the thirteenth Olympian but since he resided in the underworld and not on Mount Olympus he was not known as an Olympian. Hades was also the one who helped Zeus defeat their father Cronus and helped them to become Gods.
9. Baker’s Dozen
There were twelve Greek gods with thrones on Mt. Olympus, but the Greeks couldn’t agree on who exactly those twelve gods were. Zeus, Hera, Poseidon, Apollo, Artemis, Hermes, Athena, Demeter, Ares, Hephaestus, and Aphrodite all appear consistently on the list of Olympians (as they’re called), but the last throne is split in the sources between either Hestia or Dionysus.
10.Good to be the King
Zeus was the allfather of the Greek gods, ruling supreme in the sky. Although he was married to Hera, Zeus famously sired many children with gods, nymphs, titans, and mortals alike. The term “allfather” wasn’t a metaphor!
Hope this helped!
-RosemaryAndStars