Sperari Tumblelog

With just a few weeks of training, you can learn to “see” objects in the dark using echolocation the same way dolphins and bats do.

Ordinary people with no special skills can use tongue clicks to visualize objects by listening to the way sound echoes off their surroundings, according to acoustic experts at the University of Alcalá de Henares in Spain.

For nearly everyone in the U.S., Canada and Europe, a banana is a banana: yellow and sweet, uniformly sized, firmly textured, always seedless. Our banana, called the Cavendish, is one variety Aguilar doesn’t grow here. “And for you,” says the chief banana breeder for the Honduran Foundation for Agricultural Investigation (FHIA), “the Cavendish is the banana.”

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That sameness is the banana’s paradox. After 15,000 years of human cultivation, the banana is too perfect, lacking the genetic diversity that is key to species health. What can ail one banana can ail all. A fungus or bacterial disease that infects one plantation could march around the globe and destroy millions of bunches, leaving supermarket shelves empty.