Matter & Energy

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balloons

HEFTY HELIUM  A reservoir of more than a trillion liters of helium gas are stashed away beneath Tanzania, enough to fulfill global helium demand for everything from party balloons to MRI machines for years.

Shark snout

IT’S ELECTRIC  A shark’s snout contains tiny pores, known as ampullae of Lorenzini, which can sense weak electric fields from prey. New research indicates that a jelly inside the pores is a highly efficient proton conductor.

cancer nanotubes

SQUEEZE PLAY  When trapped inside tight tubes, cancer cells divide unevenly. But as their membranes bulge (shown with yellow arrows), the cell division gets a little less distorted.   

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