Ankidroid additions related to Science, History and Philosophy. More information about Anki can be found in this article.
The First Earth Eon
The Hadean Era is between 4.54 and 4 billion years ago. There was no air; the earth was besieged by Lava floods, magma and volcanos, resembling the apocryphal ‘hell’ of Hades (God of the underworld – land of the dead) from Greek mythology.
The blood-red moon appeared 15 times bigger than it is now and located just 20,000 miles away. The earth’s spin grew slower over time and the days and nights became longer. The moon drifts away from Earth 4cm a year.
In case you wondered how the Moon might have formed: The New Science of Moon Formation
Persephone
In Greek Mythology, Persephone was the daughter of Zeus and Demeter. Hades, god of the underworld (her uncle twice over) fell in love with Persephone when he saw her picking flowers in a meadow. He carried her off to live with him in the Underworld, (or perhaps abducted is the better word) and married her.
Persephone was initially distraught, but Hades was kind to her and showered her with gifts. He put Persephone’s throne right next to his and allowed her equal rule alongside him. She became Queen of the underworld. The marriage of Hades and Persephone symbolized the relationship between life and death.
Her temporary return to the surface represented the embodiment of Spring and vegetation.
As silent as my husband, Hades himself,
Excerpt from Theodora Goss’ poem – Persephone in Hades
who sits all day in his library reading scrolls
lost to the world above us. “Why did you bring me
to this stagnant country,” I ask him, “if not to talk?
To sit and brood in a chair made out of bones,
or stare out the window at the unchanging garden,
in which only yew trees grow, and never speak?
Why abduct the daughter of Demeter?
“The more I live, the more I learn. The more I learn, the more I realize, the less I know.”- Michel Legrand
Observation Blogger 
Greek mythology is very interesting. Excellent.
I was never really interested in it until recently. That Hades and Persephone story and its link to the Hadean era (the underworld) and LUCA (Last universal common ancestor ie single cell organism) – the first life form (3.8 billion years ago) is very cool.
I don’t know much about it. It’s very interesting.