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How does carbon dating work?

“Carbon-14 dating estimates the age of once-living things by measuring how much radioactive carbon-14 is left. Its half-life is about 5,730 years.”

Reference: American Chemical Society

What saturation of sulfur dioxide will cause people to cough

Sulfur dioxide is a colorless gas with a suffocating, choking odor. It is toxic to humans and concentrations as low as 8 ppm will produce coughing. Incredibly, in the Odyssey, Homer describes the burning of sulfur (formation of SO2) as a way that homes were 'fumigated'.

What do diamonds and pencil lead have in common?

Diamonds and graphite, the "lead" in pencils, are both made entirely of carbon. The only difference is how their atoms are arranged.

Were the pyramids built by slaves?

Archaeologists now believe the pyramids were built by paid Egyptian laborers rather than slaves, based on workers' tombs and villages discovered near Giza in the 1990s.

Another fact

“Carbon-14 dating estimates the age of once-living things by measuring how much radioactive carbon-14 is left. Its half-life is about 5,730 years.”

More from this shelf

What saturation of sulfur dioxide will cause people to cough

What do diamonds and pencil lead have in common?

Were the pyramids built by slaves?