Do you have a question about history? Send us your question at history@time . com and you might find your answer in a future edition of Now You Know. The first photographs were taken in the late 1820s, and the new medium developed throughout the rest of the century as a practical tool, artistic form and social activity. But, even though there were a few smiles to be found in the early years of photography, it took until the 1920s and ’30s for smiles to start becoming the standard expression in photographs.

Pat Summitt never wandered too far from the Tennessee hay fields where she grew up doing her chores. The winningest Division 1 college basketball coach of all-time, with 1,098 victories and eight national titles over an incredible 38-year career at the University of Tennessee, was honest, accessible, and always put in the work. In a profession full of hucksters, Summitt, who died on Tuesday at 64 after battling early onset dementia, Alzheimer’s type, was the real deal.

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Photographs of a completely naked Prince Harry have surfaced online. Published by TMZ, the grainy photos — which appear to have been taken on a camera phone — show the prince in what the celebrity news site claims is a game of “strip billiards” at his VIP suite at the Wynn Resort, Las Vegas. In one of the photos, Harry is seen covering his crotch while an unknown female, also dressed in her birthday suit, stands behind him.

TIME February 25, 1952 12:00 AM GMT-5 Prairie dogs, burrowing owls and rattlesnakes—so says an old legend—all live happily together in the same holes. For years zoologists have protested that this kind of thing is very unlikely. But many a rural Midwesterner refuses to give up the legend. Farmers testify that they have seen owls and prairie dogs coming out of the same hole. Some maintain stoutly that they have seen an owl go down a hole and a moment later heard the buzzing of a rattler there.