Report Abuse. An egg lives for around 12 hours after ovulation. Sperm can live for about five days inside the uterus, so providing those two time frames collide, it can be pretty soon after sex.
The tail arrangement is believed to have been a defensive weapon against predators. The term thagomizer was coined by Gary Larson in a 1982 Far Side comic strip, in which a group of cavemen in a faux-modern lecture hall are taught by their caveman professor that the spikes were named for the late Thag Simmons.
Who really invented the mountain bike? Klunkerz, a film from director Billy Savage entertainingly answers that contentious question by telling the story of the evolution of what we now call the mountain bike. Savage has plenty of help: he seems to have found just about every one of the surprisingly large number of people who were involved.