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BBC
Bbc Nature: Hammerhead Sharks
Hammerhead sharks are recognizable for their bizarre head shape which is thought to make the shark more sensitive to electrical signals used to detect hidden prey. There are ten species of hammerhead. Learn more about hammerhead sharks...
Smithsonian Institution
National Museum of Natural History: American Mammals: Star Nosed Mole
No other mammal in the world looks like the star-nosed mole, which has 22 fingerlike appendages surrounding its nostrils. It has recently been discovered that these very sensitive tactile organs are used for object manipulation, and...
Other
Institute for Telecommunication Sciences: Resonance
This site contains a straightforward definition of resonance in an electrical circuit.
National High Magnetic Field Laboratory
Magnet Academy: Lee De Forest
American inventor Lee De Forest was a pioneer of radio and motion pictures. He received more than 300 patents over the course of his lifetime, the most important of which was for a three-electrode vacuum tube, or triode, that he called...