No one knows Albert Einstein's last words. Just before he passed, he spoke several words in German, but his nurse only knew English.
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Cows can sleep standing up, but they can only dream lying down.
745
Your body is creating and killing about 2.4 million red blood cells per second.
17
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13