Usha Vance had been set to visit Greenland to see cultural sites, including a major dogsled race - the Avannaata Qimussersua.

Sea ice extent is at record, and near record, lows for this time of year in both polar regions, leaving the planet ...

The Arctic Ocean likely had the smallest winter ice cover in 47 years of satellite records this season, with just 5.53 ...

Astronauts, cosmonauts, and taikonauts have travelled into space since the 1960s, and humans have been in space continuously ...