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Most ocean species have not been classified

Scientists estimate that 91 percent of the species in the ocean have yet to be classified.

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The number of species that live in the ocean is unknown. Researchers keep adding to what is known about ocean life.

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Any two people share about 99.6% of their DNA

On average, any two people's genomes are about 99.6 percent identical.

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Rogue waves are twice as big as the waves around them

Scientists define rogue waves as waves greater than twice the size of the waves around them.

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GPS satellites circle Earth twice a day

GPS satellites fly at an altitude of about 20,200 kilometers, and each one circles Earth twice a day.

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