Deaths

Scientists revive some brain cells in pigs — four hours after death

Photo of pig brain neuronal activity before and after BrainEx tool is used
Immunofluorescent stains for neurons (green), astrocytes (red), and cell nuclei (blue) in the hippocampal region of pig brains 10 hours after death. On left, left untreated the brain cells show disintegration. On right, BrainEx salvages some activity. Photos: Stefano G. Daniele & Zvonimir Vrselja/Sestan Laboratory/Yale School of Medicine

Scientists have developed a tool they say is able to briefly restore circulation and some brain activity — but not consciousness or global electric functions — in the brains of pigs 4 hours after death.

Why it matters: Researchers hope to eventually have the ability to restore some lost brain functions in humans after injuries or cell death from stroke or diseases. This study, published in Nature Wednesday, offers a new tool likely to enable progress toward that goal. However, it's also expected to pose ethical dilemmas down the road — such as, will we eventually have to redefine the line between life and death?

Death threats target freshmen Reps. Alexandria Ocasio-Cortez and Ilhan Omar

Freshmen Reps. Alexandria Ocasio-Cortez (D-N.Y.) and Ilhan Omar (D-Minn.) said that with every conservative critique they each receive, death threats spike.