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Astronomers in California are building the largest digital camera in the world. It will go on a giant telescope taking shape in Chile called the Large Synoptic Survey Telescope.

LSST is different from most large telescopes. Instead of staring at a tiny patch of the sky and taking essentially one snapshot in time, LSST will take a panorama of every part of the sky...and it will do so over and over and over. The idea is to see what's moving or changing in the heavens.

It's tough getting old, and that goes as much for giant pandas as people.

Veterinarians at the National Zoo in Washington, D.C., say Tian Tian, an adult male panda, received laser treatment and acupuncture for what they initially thought was a touch of arthritis in his left shoulder.

During the exam earlier this week while the 20-year-old Tian Tian (pronounced t-YEN t-YEN) was under anesthesia, vets also took blood and urine samples and performed X-rays.

Updated at 8 p.m. ET

TransCanada, the company that owns and operates the Keystone Pipeline, says that an estimated 210,000 gallons, or 5,000 barrels, of oil have spilled near the small town of Amherst, S.D.

Would you be curious and excited if, out on a walk near your home, you came face-to-face with a young owl, not yet a confident flyer?

Scientists believe they may have new insights into why passenger pigeons went extinct, after analyzing DNA from the toes of birds that have been carefully preserved in museums for over a century.

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