The radioactive isotopes even at low levels can be recognized by radiation detectors at airports and borders, leading to the arrest of poachers and traffickers.

President Donald Trump’s plans to add a massive $200 million ballroom to the White House is angering critics, who see him moving forward with the long-sought project as part of his desire to leave ...

More fireflies than usual are lighting up summer evenings in parts of the U.S. But scientists say the lightning bugs are still on the decline.

HEARTBREAKING footage has emerged showing a toddler playing around a small plane just days before it crashed and killed the ...

HEARTBREAKING footage has emerged showing a toddler playing around a small plane just days before it crashed and killed the ...