Biosphere

Ancient oceans were starved of key nutrient

Ancient oceans were starved of key nutrient

The Earth's ancient oceans held much lower concentrations of sulphate - a key biological nutrient - than previously thought, a new report says.

Nov 09, 2014, 11:33 AM IST

Earth supports one-third less life than estimated

Previous estimates about the total mass of all life on our planet have to be reduced by about one third, according to a study by a German-US science team.

Aug 28, 2012, 22:11 PM IST

`Ozone layer no longer disappearing`

According to UN scientists ozone layer could be back to full strength by middle of this century.

Sep 21, 2010, 14:05 PM IST