Mysterious figure with hands pressed against frosted glass, evoking a spooky atmosphere.

Two Ghost Ancestors Found Hiding in Living DNA

A method that reads family trees inside 503 living genomes has pinpointed DNA from two archaic human populations that were never sequenced, one shared by all people and one that entered Oceanians through Denisovans.

A security guard shining flashlight up a stairwell.

The Working Poor Security Guards Who Protect Everyone Else’s Safety

A new UC Berkeley Labor Center analysis profiles California’s 186,000 security guards. Most earn below a living wage, over half the low-wage tier lack employer health insurance, and annual turnover nears 92 percent. Researchers link that churn to weaker safety, citing airport screening data. The workforce is overwhelmingly people of color.