Beneath the moon's cratered surface lie networks of lava tubes and deep pits, natural caves that could shelter future lunar ...

Solar sails have some major advantages over traditional propulsion methods—most notably, they don't use any propellant. But, ...

In Pirates of the Caribbean, Jack and Will use an overturned dinghy to hold air underwater. Madness or brilliance?

HAZAR, the derelict torpedo retriever, was dismantled by Stevens Towing before it was sunk as an artificial reef by the S.C.