How many hurricans were there in 2012?

What thickness of paper can stop an alpha particle? How did mount paricutin get its name? How does oxygen depletion affect fish and other organisms? What special protein help a protein fold correctly? Why do we never use the coarse focus knop while the high power 40x lens in place? Is shredding a newspaper a result of a chemical property? What constitutes living together? Which laboratory equipment is correctly paired with a unit in measurements? How is the motion of ball bearings similar to da motion of the gas particles? Can you control your heredity? What country was given credit for industrial era 275 years ago? What does black mean on a weather radar? What does the extraction buffer and ethanol do in DNA extraction? What is needed to facilitate active absorption? How do you get different color eyes? Why is it important for scientists to understand how viruses spread? What is the enthalpy value of an intermediate reaction? How do you smoke ice crystal? What happens to red litmus paper if dipped in water? What is the success rate of metal detectors?

How many hurricans were there in 2012?