Joe PalcaJoe Palca is a science correspondent for NPR.
This 1793 grave is an early version of the kilogram. It is possible this object, now owned by the National Institute of Standards and Technology museum, was once pirate treasure.
A technician examines the mirror on the Large Synoptic Survey Telescope. Scientists at two national laboratories are currently building the components for an enormous digital camera that will capture images from the telescope.
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Patients with Type-1 diabetes don't have enough healthy islets of Langerhans cells — hormone-secreting cells of the pancreas. Granules inside these cells release insulin and other substances into the blood.
Steve Gschmeissner/Science Source
Left to Right: Rainer Weiss, Barry Barish and Kip Thorne, who won the Nobel Physics Prize 2017 for gravitational waves, the Royal Swedish Academy of Sciences announced October 3, 2017 in Stockholm.
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