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TIL that a male horse and female donkey make a hinny, not a mule

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09Kv TIL There is enough water in Lake Superior to cover the entire land mass of North and South America with roughly one foot of water
GJG5 TIL that Viking blacksmiths would often add bones from ancestors or animals like bears to their iron ore to add carbon content, and to imbue the weapon with mystical properties.
oMKE TIL Horror movie soundtracks sometimes include infrasound, which is sound below the range of human hearing. Even though we can’t hear it we can still feel it and infrasound has been shown to induce anxiety, heart palpitations, and shivering.
b9v64 TIL President Franklin Pierce didn't swear his oath of office on a Bible. Weeks after his election, Pierce was in a train accident, in which he witnessed his son die before his eyes. He didn’t take the oath on a Bible because he believed his son’s death was God’s judgment for his campaigning.
ADM9l TIL An Extinct Bird Re-Evolved Itself Back Into Existence