Archaeologist and folklorist Billy Mag Fhloinn rediscovered the Altóir na Gréine, or the "Altar of the Sun," in Ireland. (Seán Mac an tSíthigh)

Everyone Thought This 4,000-Year-Old Tomb Had Been Destroyed. Then, an Archaeologist Found It

Billy Mag Fhloinn located the Altóir na Gréine, thought to have vanished in the 19th century, in southwest Ireland

Sarah Kuta

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These Paintings Reveal How the Dutch Adapted to Extreme Weather During the Little Ice Age

Nearly 1,000 Manatees Converge on Florida State Park to Keep Warm in Record-Breaking Sighting

SPONSOR: DISCOVER SOUTH CAROLINA

Discover the Heritage and Traditions of the Gullah Culture

See Dazzling New Images of 19 Spiral Galaxies Captured by the James Webb Space Telescope

Plagues That Ravaged the Roman Empire Were Linked to Periods of Cold Weather

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Climate Activists Throw Soup at the 'Mona Lisa'

On this day in 1948, Mohandas Gandhi, leader of India's independence movement, was assassinated. This religious and spiritual leader dedicated his life to civil rights work in India and was frequently imprisoned for his advocacy.

Read more about Gandhi's "Quit India" movement and how his speech brought India closer to independence from British colonizers.

Double Rainbow Over Harpers Ferry, WV

© Marti Steiner Unger