How Many People is Too Many People?

It's estimated that one in 10 women experience endometriosis during their reproductive years, a condition where cells that line the uterus go rogue by moving to other organs, taking root and spreading there, leading to terrible pain. Many women who have the disorder struggle to be properly diagnosed. Bioengineer LINDA GRIFFITH talks about her groundbreaking research into endometriosis.

The Pfizer and Moderna COVID-19 vaccines are the first vaccines to be activated by mRNA — and would not have been possible without the invention of the gene editing technology known as CRISPR. In his new book, The Code Breaker, author Walter Isaacson chronicles the development of CRISPR.

Science writer Ed Yong of The Atlantic says the coming months will usher in the most complicated immunization program the U.S. has ever attempted. Yong has been covering the pandemic since it began, writing about nearly every aspect.