The balloon floated off into the distance.

Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis: the ability to convert water and carbon dioxide into carbohydrates and waste oxygen using solar energy. The evolutionary precursor of photosynthesis is still under debate, and a new study sheds light.

He demonstrated by perfusion experiments that the organs of an animal thus exposed to long lasting shock may become deallergized for the duration of its life with the inhibition of the antigen-antibody reaction.

Northern made much of the scrapping of the first of the Pacers (142005), and to date 35 of its Class 142s have been scrapped, with a further 11 off-lease at Gascoigne Wood.