Pnorman's Terms

hybrid shark

Animals; Sharks

A shark with parents from two different species of sharks, having its genetic structure from one species while looking physically like another. Hybrid sharks may be the result of ...

X-51A WaveRider

Military; Air force

The X-51A WaveRider (also known as Boeing X-51) is an unmanned hypersonic scramjet that is capable of flying through the atmosphere at speeds of 3600 mph or Mach 6. At these ...

cumulative selection

Biology; Ethology

The process by which complex behavioral patterns evolve gradually from less complex behavioral patterns through long and slow accretion.

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