The Chicago Archaeopteryx, unveiled in May, has been on display in a temporary exhibit. It will go off view for the summer while its permanent exhibit is under construction. (Patty Wetli / WTTW News)

After Saturday, the Field Museum’s newest dinosaur fossil will be off display until fall while staff works on building a permanent exhibit for the Chicago Archaeopteryx.

The Chicago Archaeopteryx was unveiled Monday at the Field Museum. (Patty Wetli / WTTW News)

The Field Museum ushered in a new era of scientific exploration with Monday’s unveiling of the Chicago Archaeopteryx.

Skull of archaeopteryx embedded in rock

A piece of evolutionary history has made its way to the Field Museum. A remarkably preserved Archaeopteryx fossil has been acquired, offering an astonishing window into the transition between dinosaurs and modern birds. This rare and scientifically significant find sheds new light on the origins of flight and the incredible journey of evolution.

A graphic that says “Where in the World is Archaeopteryx”? (Nicole Cardos / WTTW News)

Only 13 specimens of Archaeopteryx — and one special feather — are known to exist since the first Archaeopteryx fossils were discovered in 1860. Most come from the same deposit of Solnhofen Limestone in Bavaria, Germany.

Jingmai O’Connor, associate curator of fossil reptiles at Chicago’s Field Museum of Natural History. (Patty Wetli / WTTW News)

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.

Jingmai O'Connor, associate curator of fossil reptiles, with the Chicago Archaeopteryx specimen, at the Field Museum, March 2024. (Patty Wetli / WTTW News)

The Field formally announced to the world what had become a not-so-well-kept secret: The museum had acquired just the 13th specimen known to exist of Archaeopteryx, a fossil often described as the “missing link” between dinosaurs and birds.

Jingmai O’Connor, associate curator of fossil reptiles at Chicago’s Field Museum of Natural History. (WTTW News)

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.