Answer: Carbon Scientists speculate that diamonds originated from carbon dioxide atoms 100 miles below the Earth's surface more than a billion years ago.

Answer: 3 Of course, as time passes, the smallest Erdős number that can still be achieved will necessarily increase, as mathematicians with low Erdős numbers die and become unavailable for collaboration.

Answer: Earthquakes The Richter scale measures the size of Earthquakes. The formula, mb = log10(A/T) + Q(D,h), is used. The Richter scale ranges from 1-10. The highest recorded Earthquake was on May 22, 1960 in Southern Chile. The richter scale of this Earthquake was a 9.5.