Extant and ancient cephalopods—including octopuses, squids, extinct ammonites, cuttlefish and nautiluses—have all had to solve the problem of buoyancy, whether they have hard external shells or not.

Editor's Note: Julian Hunt, the lead researcher on this study, has contacted us to say the figures quoted in the original press release, as well as the research paper and subsequently this piece, are ...

Swedish company NoviOcean has tested a third-gen prototype of its combination wind/solar/wave energy platform, a floating platform rated for up to 1 megawatt of consistent clean energy around the ...

Ah, the stately hot air balloon. Not really useful for all that much except for having a grand old time floating around the skies, it's still a marvel of simple physics. Fill a giant balloon with air.

Legend has it that the ancient Greek scientist Archimedes discovered the law of buoyancy in a bath and ran naked through the streets of Syracuse shouting “eureka!” – or “I have found it”. That is, the ...

The Cartesian Diver: this is a classic demo named after the17 th-century philosopher and mathematician René Descartes. Buoyancy is the force that decides whether an object will sink or float, and has ...