Here are two examples that result in 'early fetal death' - Trisomy 13 and Trisomy 18. Meaning that when the normal [genetic] chromosomal complement is a chromosome pair, three copies of each...
The spread of Islam from Mecca to all the other countries around it.That's an example because Contagious Diffusion is The distance-controlled spreading of an idea, innovation, or some other item...