Published: Dec. 21, 2017

Boulder offers a variety of exhibitions open to the campus and community at no cost. Take a look belowto see what's on display. Please note: The university will be closed Monday, Dec. 25; Tuesday, Dec. 26; and Monday, Jan. 1.

Museum of Natural History

Cannabis: A Visual Perspective

Thisexhibit, the first of its kind in the nation, explores the diversity of the genusCannabisand spotlights the groundbreaking research conducted at Boulder to expand our knowledge of this group of flowering plants.It featuresa juried selection of botanical illustrations rendered in watercolor, colored pencil, print and mixed media. Open through Jan. 26.

Curious Connections in Nature

Discover the role of the prairie dog in Colorado’s grasslands. Learn about the microbes we host in our bodies.Delveinto these connections and theimportant work of these animal scientiststhrough hands-on activities, multi-media displays and specimens from the museum’s collection.

Discovery Corner

At the newlyremodeled children's area, young visitors (and their favorite adult) can discover, design, doodleand more while developing their curiosity and making connections to the natural world.Thespace encourages children to touch real museum specimens, share a story from the curated collection of children's books,spend meaningful time togetherand make new friends!

Fossils: Clues to the Past

A permanent member of the natural history museum, Fossils: Clues to the Past allows visitors to see how fossils are studied and what things can be learned from them. Located in the Paleontology Hall.

Ground Level Ozone

The Ground Level Ozone exhibit takes a look athow human activities have increased the amount of ground level ozone, an invisible, highly irritating gas that forms just above the earth’s surface, to a level that is harmful to life on our planet. Located in the McKenna Gallery hall.

Unearthed: Ancient Life in the Boulder Valley

This exhibit features a collection of 80-plusstone tools known as The Mahaffy Cache that was found in a Boulder backyard in 2008. The tools date back approximately 13,000 years, near the end of the last Ice Age. It explores the science behind the extraordinary discovery through interactive elements and touchable replicas.Located in the Anthropology Hall.

Visit the at Henderson Building from 9 a.m. to 5 p.m. weekdays, from9 a.m. to 4 p.m. Saturdayandfrom 10 a.m. to 4 p.m.Sunday.

Heritage Center

in Space

The space exploration gallery currently highlights: 's 20 system-wide astronauts, an Aerobee rocket suspended from the ceiling, artifacts recovered from the wreckage ofspace shuttle Challenger, a lunar sample and other spacesuits and equipment used by astronauts.

Here Comes Ralphie!

Discover 's early unoffical mascots—including a dog, goat and donkey—and learn about Ralphie's extraordinary appearances over the last 50 years, when the university named the buffalo its official mascot.

Hit the Bricks!

Roughly 1 million LEGO bricks take the shape of the Boulder campus in this fun exhibit. Hit the Bricks! features campus buildings and facilities, a MAVEN spacecraft, whimsical reflections of campus life, an Eye Spy scavenger hunt and more.

Visit the on the third floor of Old Main from 10 a.m. to 4 p.m. Monday through Saturday.