NASA's Regolith Excavation Challenge invited teams to build machines for digging mock moon dirt, or regolith, in a competition held in a one-ton sandbox on Saturday.
But all the teams fell well short of the winning requirement of 330 pounds (150 kilograms) of regolith deposited in a container in 30 minutes, and no one claimed the $250,000 (185,377 EUR) purse.
An excavator built by Technology Ranch of Pismo Beach did the best, collecting just over 143 pounds (65 kilograms) in half an hour. All the other machines broke down while digging.
The other three teams were from Berkley, Michigan; Rolla, Missouri; and Rancho Palos Verdes.
The prize rolls over to next year's competition, which will be worth $750,000 (556,132 EUR).
The head of Russian Technologies, Sergei Chemezov, clarified the fate of anti-aircraft guided missiles that Russia was supposed to deliver to China
The Basmanny Court of Moscow arrested Michael Calvey, the founder of Baring Vostok investment fund, on allegations of embezzling 2.5 billion rubles from Vostochny Bank. Calvey will be held in custody until April 13