Glen Affric: Caledonian Forest

From wikipedia: The Caledonian Forest is the name given to the former (ancient old-growth) temperate rainforest of Scotland. The  known extent of the Roman occupation suggests that it was north of the Clyde and west of the Tay. The Scots pines of the Caledonian Forest are directly descended from the first pines to arrive in Scotland […]

Noctilucent Clouds

Noctilucent (“night-shining”) clouds are a rare phenomenon: the highest clouds in the atmosphere, at altitudes between 47-53 miles, consisting of tiny crystals of water ice about 100nm in diameter and requiring very cold temperatures to form. Not fully understood, they are a recently discovered meterological phenomenon with no record of their observation before 1885. They also […]