P eople across Europe were pretty confused last night, after a giant blue swirl appeared in the sky, lasting several minutes.

Once released, the second stage will eject any leftover fuel, which freezes instantly due to the altitude and forms into a spiral pattern because of the rocket's movement as it falls back to Earth.

“These crystals caught the sunlight, creating the bright spiral pattern in the sky,” O’Donoghue said. “The spiral shape happened because the tumbling rocket was spinning as it released the ...

The last 18 years have seen the lowest sea ice levels on record, a downward spiral that will continue, scientists say. The Arctic will be ice-free in the summer at some point by 2050, even if ...