Greece could revert to the drachma -- the currency it had before entering the euro in 2001 -- but there is also speculation it could operate with a Greece-specific euro until a full switch can take place.

CNN: The trillion dollar question: Will Greece exit the euro?

The car-plane hybrid can operate as a vehicle on the road and with the flip of a switch, wings will extend and the car will take flight.

FORBES: The Flying Car Has Arrived (Seriously)

That project got put on the backburner and Better Place instead said it would build battery switch stations for a small fleet of electric taxis that would operate from the San Francisco and San Jose airports.

FORBES: Better Place To Shut Down U.S., Australian Operations