It was over 20 years ago, on Feb. 6, 2001, that " Good Morning America " made morning television history by taking viewers ...
Complicated births may not have arisen in humans as a trade-off between our need for big brains and pelvises suitable for ...
They might even alter the genes of a developing fetus and create, in effect, custom-made babies. But should they? Like no other species on Earth, we humans can influence what genes and traits are ...
And pregnant humans ... give birth to live young, the indirect costs made up roughly 55% on average of their reproductive energy. “For mammals, the indirect costs of making babies was huge ...