These bright colour trails mark the tracks of stars, caused by the rotation of the earth. This time-lapse photograph was taken from the European Southern Observatory’s Paranal station in the high Andes, far away from any light pollution. These natural colours indicate differences in temperature; the reddest stars are around 1000C, whist the hottest stars at several tens of thousands of degrees, appear blue (Image: ESO/B. Tafreshi (twanight.org)/Wikimedia Commons)
Heated eyes give swordfish deep-sea ‘night vision’
Some 300m below the ocean surface it is always twilight, and cold… The water is barely above zero. Fast-moving squid…
Charles Lyell was perhaps the most famous geologist of the nineteenth century, and one of the first notable scientists to throw their intellectual weight behind Charles Darwin’s theory of evolution by natural selection.
