In 2020, a Chinese virologist fled to the United States, aided by allies of President Trump who sought to promote her unproven theories about the origins of Covid-19. Her husband still can’t find her.Dr. Li-Meng Yan spoke in 2021 at a summit in Anchorage, Alaska, on early outpatient treatment for the Covid-19 virus.

Officials said one person was killed and 20 others were poisoned after eating death cap mushrooms, which look and taste like safe mushrooms but can cause liver failure.California health officials advised people to stop foraging for wild mushrooms after a poison found in one variety killed one person and caused liver damage to others.

Mr. Trump is pushing to approve their production in the United States.A Japanese kei-car sits in a garage in Sapporo, Japan.

Only four donors have transmitted rabies to organ transplant recipients since 1978, according to federal officials.A man died of rabies he contracted after receiving a kidney transplant from another person who later tested positive for the virus after being scratched by a skunk.

Scientists fear warming is driving a collapse in the ocean currents that shape climate far and wide. The ice-choked waters off Greenland might hold the key.