Zothecula writes: We may be closer to the day when United States Marines will, within a matter of minutes, use a handheld app to summon robotic helicopters to deliver battlefield supplies. On Tuesday, the Office of Naval Research (ONR) announced its five-year, US$98 million Autonomous Aerial Cargo Utility System (AACUS) program, with the specific aim of developing "sensors and control technologies for robotic vertical take-off and landing aircraft."
Today's scientific question is: What in the world is electricity?
And where does it go after it leaves the toaster?
-- Dave Barry, "What is Electricity?"