oxygen

Discovery of oxygen on comet 'big surprise'

Stunned scientists announce the unexpected discovery of large quantities of oxygen on a comet which streaked past the Sun in August with a European spacecraft in tow.

April 23, 2016
April 23, 2016

Direct evidence of ancient Mars’s oxygen-rich atmosphere

Rocks on the surface of Mars have provided the best clue yet that the red planet once had an atmosphere rich in oxygen.

October 29, 2015
October 29, 2015

Discovery of oxygen on comet 'big surprise'

Stunned scientists announce the unexpected discovery of large quantities of oxygen on a comet which streaked past the Sun in August with a European spacecraft in tow.

April 17, 2015
April 17, 2015

Tonnes of dead fish removed from Rio Olympic rowing venue

Brazilian workers remove more than 33 tonnes of dead fish from the 2016 Olympic rowing and canoeing venue in Rio de Janeiro.