NEW HAVEN, Conn., Feb. 8 (UPI) -- U.S. physicists, using artificial atoms, say they have demonstrated the particle nature of microwave photons can be detected.

Italian retiree plans to hike across U.S.... Baby seal swims up Delaware River... City judge censured for rudeness, mockery... Trip covers 18,000 miles in 24 fillups... Watercooler stories from UPI.

CAMDEN, N.J., April 4 (UPI) -- A young grey seal has taken a wrong turn and headed up the Delaware River to the Philadelphia area.