Mars had an oxygen-rich atmosphere around 4 billion years ago
13
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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If Earth's history was condensed into twenty-four hours, life would've appeared at around 4am, land plants at 10:24pm, dinosaur extinction at 11:41pm, and human history would’ve began at 11:58:43pm.
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Your body is creating and killing about 2.4 million red blood cells per second.
17
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Only about 2% of the world population has green eyes.
36
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81