The iridescent cloud reveals new clues about ice formation in the Martian atmosphere (no little green men, sorry).

Contrails conjure a sense of something overwhelming and ineffable, as terrifying as it is beautiful.

Image: Kyogo Furuhashi (right) is set to leave Celtic for Rennes, with Jota moving the other way in a return to Glasgow Celtic manager Brendan Rodgers has confirmed deals involving Kyogo Furuhashi ...