Usually, it's because the sperm gets into the fallopian tube before the egg is released. Once there, the sperm wait for an egg to arrive. After fertilization, it can take 5-10 days for the fertilized egg to begin to attach itself to the lining of the uterus. Pregnancy begins when this happens.
The arrangement of spikes originally had no distinct name; the term Thagomizer was coined in 1982 by cartoonist Gary Larson in his comic The Far Side, and thereafter became gradually adopted as an informal term within scientific circles, research, and education.
Activist and author James Weldon Johnson, employed since 1916 by the National Association for the Advancement of Colored People (NAACP) as a field secretary, coined the term Red Summer.. In 1919, he organized peaceful protests against the racial violence of that summer. McWhirter, Cameron, Red Summer: The Summer of 1919 and the Awakening of Black America (NY: Henry Holt, 2011). 2  Krist, Gary. 3  City of Scoundrels: The Twelve Days of Disaster That Gave Birth to Modern Chicago. 4  New York, NY: Crown Publisher, 2012.