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When we think of bones we think of hard substances. But a weird fact about the human body is the bones are filled with spongy substances known as bone marrow.
Giraffes sleep for only 30 minutes a day.
Giraffes have fairly typical sleeping patterns.
To debunk this one, researchers closely monitored a herd of five adult and three young giraffes for 152 days, counting all of their naps and deep sleeps.
The animals typically slept overnight and napped in the afternoon (sound familiar?).
In total, each giraffe slept about 4.6 hours every day.