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Friday, July 10, 2026

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Not a Plant, Not a Sheep… It’s a Photosynthesizing Slug!

But it’s dressed like a plant… and powers itself like one, too.

Meet the Leaf Sheep (Costasiella kuroshimae) — one of the smallest and strangest marvels of the sea.

Barely the size of a grain of rice, this creature has black ear-like tentacles, bead-black eyes, and a back covered in tiny green “leaves.”

Those aren’t leaves at all — they’re cerata, filled with stolen chloroplasts from the algae it eats.

Through a process called kleptoplasty, the Leaf Sheep turns sunlight into energy, making it one of the few animals on Earth to photosynthesize.

Its leafy camouflage hides it among seaweed while its stolen solar cells fuel its day.

Drifting through warm Indo-Pacific reefs, it grazes on algae like a tiny sheep of the sea… except this one runs on sunlight.

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Thursday, July 09, 2026

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Click on headline to read entire (short) Smithsonian article...

Regulus Missile Mail Letter

On June 8, 1959, the US Navy fired a Regulus I missile from the USS Barbero (SSG-317) and directed it to land at the Naval Auxiliary Air Station at Mayport, Florida, near Jacksonville. While the sub was docked at Norfolk, Virginia, Postmaster General Arthur Summerfield helped place two blue and red metal containers, holding 3,000 letters, inside the sub’s missile prior to the flight.

The missile was fired from the submarine shortly before noon and arrived at Mayport twenty-two minutes later. The 3,000 letters inside the missile were identical letters from the Postmaster General that were addressed to President Eisenhower, Vice President Nixon, cabinet members and top federal officials, all members of congress, Supreme Court justices, U.S. governors, postmasters generals from around the world and the officers and crew of the Barbero. Summerfield’s letter was an enthusiastic announcement of the experiment, which had not been publicly announced beforehand. Summerfield’s office received several letters from stamp collectors who complained that they had not been given the opportunity to place items aboard the flight. In the four decades since the flight, some of the Regulus I letters have found their way into public hands. Some made their way to dealers that year and were sold at over $100. The letter addressed to the secretary of the Smithsonian Institution remains in the National Postal Museum’s collections.