“Historically, the birthing process has limited brain size, because babies’ heads had to fit through the birth canal.
Today, however, Caesarian sections circumvent that process. As many as 46 percent of babies born today in China are delivered via C-section, Pobiner said. With advances in fertility and better postnatal medical care, she asked, “Are we screwing with natural selection?” [DS: yes]
The world population is growing, and a bigger population also evolves faster, Pobiner said. But, with rising sea levels and less land available, waterborne and airborne illness could spread more easily [global plague], Pobiner said.
The largest virus ever found was a virus thawed from permafrost, known as Pithovirus. While this parasite doesn’t infect humans, what if other ancient viruses thaw out that are harmful? [then non-Europeans will die] For example, the smallpox virus was eradicated in 1979, according to the World Health Organization, but some experts say it has only been eradicated from the Earth’s surface, surviving instead in frozen form. [diseases evolve too]
And human evolution persists in other areas too, such as sexual selection. A recent study found that beards become more attractive when they’re rare in a population. When “peak beard” is reached, they become less attractive, the study found. Economic conditions may also influence beardedness, as unemployed men may use beards as a sign of masculinity, Pobiner said.”