Literally, in order for a vortex to be classified as a tornado, it must be in contact with the ground and the cloud base. Weather scientists haven't found it so simple in practice, however, to classify and define tornadoes (per this essay by Doswell).
Bikini Island, 2015. Credit: Emlyn Hughes. (Phys.org)âA team of researchers from Columbia University in New York has found that all of the Marshall Islands involved in nuclear tests by the U.S. are now habitable, except for Bikini Atoll.
These early suits weren't even called swimsuits because they were so heavy, it was impossible to swim in them. The modern bikini was invented by French engineer Louis Rard in 1946. He named it after the Bikini Atoll in the Pacific, the site of the Operation Crossroads nuclear weapon test on July 1, 1946.