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Dance cards were common on college campuses in the mid-1900s.

Astronaut Kalpana Chawla died aboard the Columbia on Feb. 1, 2003.

In 1943, a military band drills in front of what is now known as Baker Hall.

In a snowy outdoor ceremony on Sept. 20, 1875, Boulder town officials and members of the Masonic Grand Lodge placed a small tin box with nearly 50 items in the cornerstone of what would become Old Main.

Astrogeophysicist Jo Ann Cram Joselyn donated her 1960s charm bracelet to the CU Heritage Center.

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In 1958, CU Boulder professor Joyce Lebra became the first American woman to receive a doctorate degree in Japanese history.

Hugo G. Rodeck, owner of this 1903 typewriter, helped establish the CU Museum of Natural History. The museum now has the largest natural history collection in the Rocky Mountains.

The Old Main Cottonwood was removed from campus in January. Clones of the tree will be planted nearby.

The Rocky Flats Bar & Grill located south of Boulder has a rich history for many Boulder locals.