Ancient Nero's Theater ruins discovered under garden near Vatican

The ruins of Nero’s Theater, an imperial theater referred to in ancient Roman texts but never found, have been discovered steps from the Vatican.

Holiday travel: Is now the time to book airline tickets?

Airline prices for Christmas holiday travel are already tracking as high as last year. Should you book your flights now?

Whistleblower claims US is concealing program that captures UFOs

David Grusch, a retired major general, claims the U.S. has had information about "non-human" activity since the 1930s.

Traps removed near Yellowstone after no sign of grizzly bear that killed woman

Wildlife workers on Tuesday halted their efforts to capture a grizzly bear that killed a woman over the weekend near Yellowstone National Park after finding no sign of the animal since the day of the attack.

New NASA telescope expected to uncover hundreds of Earth-sized rogue planets

The findings stem from a nine-year survey known as the Microlensing Observations in Astrophysics, and according to researchers, they have already identified at least one planet that is roughly the size of Earth.

Drone video captures shark hunting off Long Island beach

A toothy shark was seen gliding through a school of fish just off the coast of Southampton, New York, on Saturday.

Woman dies after grizzly bear encounter near Yellowstone National Park

A woman was found dead in Montana on Saturday after coming into contact with a grizzly bear on a trail west of Yellowstone National Park.

'Mama bird frantically circled overhead' as nest burns atop Utah power pole, firefighters say

Firefighters in Morgan County said they received a call about 8:15 p.m. Wednesday regarding a power pole fire on the eastbound side of Interstate 84. Crews arrived to find a large osprey nest that was atop the pole on fire.

See the rare blue frog spotted in Rhode Island

Some of Rhode Island's frog species can occasionally exhibit rare blue coloration.