Navy
Nature, which has no need for devices that spy on
enemy submarines from the air and underwater, may nevertheless have invented
their form: flying fish, for example, or ducks that can zoom over the water’s
surface and dive beneath to feed. But the Navy Research Lab, or NRL, which
is working on a new drone that can both fly and swim, is learning that
combining robots for two different purposes is not as easy as nature makes
it look.
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