From a flashing blue streak to a falling trail of smoke, we now know what caused strange sightings in the sky above Hawaii ...

Investigators from the government and social media have spent months trying to find out where a mystery smell that swept through Southwest Washington on its way to Portland in September originated.

Bizarre noises detected around the deepest ocean trench on Earth have finally been identified. These strange "biotwang" sounds—first detected in 2014 during an acoustic survey of the Mariana ...

Scientists offered a new explanation for the huge craters that keep appearing in Siberia. These craters, first spotted in 2012, can be more than 160 feet deep and over 65 feet wide. They may be due to ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." An extremely slow pulsar has made scientists “slow down” their assumptions about other pulsars. The pace ...

The beginnings of a strange layer of molten rock deep inside the Earth may have finally been figured out by geoscientists. This layer, known as the D" layer, is about 1,900 miles underneath the ...