What are Impacts?
Impacts are explosion that happens when Angels come to the Earth to contact with Lilith. The Impact also happens when Evas destroy every 17 Angels.
What is First Impact?
First Impact is the first explosion on Earth. It killed most of the dinosaurs and it also destroyed some places of Earth.
What is Second Impact?
Second Impact is second explosion on Earth, which killed half of population. South Pole was melting so Earth was wiping out pollution. At the Dead Sea they found a scroll (That's called Dead Sea Scroll) and they saw that people can't evolve so Nerv made Evangelion to make Impacts.
What is Third Impact?
Third Impact happened at The End of Evangelion Part 2. Eva-01 and nine Eva-05 made brightness called Tree of Life but Rei combined with Lilith and the Third Impact happened. Rei killed all the Eva-05 and asked, "What do you want?" to Shinji and Shinji thought of his world with Asuka. Rei collected all the humans into her body and made Shinji's world.
