The vast majority of Alzheimer’s cases occur after age 65. But research published Monday suggests that for people who carry not one but two copies of the gene, it’s more than a risk factor, it’s an underlying cause of the mind-robbing disease.

Shake any family tree, and a few skeletons are bound to fall out — that’s as true for birds as it is for people. Except that for birds, the wacky cousin lurking in one of those branches is T. Rex.

WTTW News sat down with paleornithologist Jingmai O’Connor and talked about dinosaurs, birds, the Chicago Archaeopteryx, evolution and why studying fossil birds is more important now than ever.

In all, the 34 appointments Johnson made between May 2023 and April 2024 that require confirmation by the Chicago City Council reflect the city’s racial diversity, as measured by the 2020 census, more closely than the appointments made by his two predecessors, former Mayors Lori Lightfoot and Rahm Emanuel.

Exactly six months before Election Day, Biden and Trump are locked in the first contest in 112 years with a current and former president competing for the White House. It’s a race that is at once deeply entrenched and highly in flux. 

Femme fatales and goddesses play for keeps at a new exhibit at the National Museum of Mexican Art. These deities and grande dames — etched in rock or molded from clay — are in Pilsen through July.

Tensions rise over encampments at local universities. And the mayor’s relationship with the Chicago Police Department, as a manhunt leads to murder charges.

Chicago police officials on Friday officially announced charges against 22-year-old Xavier Tate Jr., who now faces counts of first-degree murder, aggravated vehicular hijacking and possession of a stolen firearm.