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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Mars had an oxygen-rich atmosphere around 4 billion years ago
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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In the last 7 years, humanity has discovered 43 potentially habitable planets.
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The oldest glowing lightbulb was first switched on in 1901 and lives in fire stations in Livermore, CA. It is known as the Centennial Light.
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