5 simple ways to heal yourself to happiness

Readers tell Pooja Bhula how they manage a way out of their negative emotions

Bugs ‘helped early animals to get oxygen`

A new study has analysed bacterial colonies in the Los Roques lagoons of Venezuela and found that it offered a refuge of oxygen-rich sediment.

Lack of oxygen forced animals to breathe

A massive plunge in global oxygen levels, not freshwater frolicking, could have led to the rise of air-breathing animals, argues a new study.