To explain these observations, they proposed a new kind of energy that is responsible for driving the universe’s accelerated expansion: dark energy. Astrophysicists now believe dark energy makes up ...

With an extreme cold warning in effect and actual air temperatures below zero in Chicago on Friday morning, several of the ...

Dozens of libraries would also be closed, the Emergency Closing Center reported. Some popular Chicago-area museums also ...

Several iconic Chicago museums will be closed Friday as extreme cold grips the city and suburbs. According to the latest ...

All three museums on Chicago’s Museum Campus will close due to the extreme weather, but expect to reopen on Saturday.

Schools, museums and government offices all planned to close Friday as residents braced for wind chills that will drop to as ...

University of Chicago astronomy and astrophysics professor Donald G. York​, who is credited with pioneering contributions to ...

Donald G. York, an astronomer with the University of Chicago who helped revolutionize the field as a co-founder of the Sloan Digital Sky Survey and made pioneering contributions to the study of the ...

Here’s a roundup of free days at Chicago-area museums, zoos and other cultural institutions. Plus 15 places that are always free.

A 2025 satellite image shows a series of ghostly ice swirls sculpted on the surface of Lake Michigan by strong winds during ...

After Santa delivered big trouble to Lick Observatory — the iconic astronomy complex atop Mount Hamilton east of San Jose where ferocious winds early Christmas morning blasted open the steel dome ...

Welcome to Chicago Parent’s online calendar, your go-to guide for the best family events in Chicagoland. Search below for kid-friendly events by area, age, date range and category.