But trees need water as well as light, and here being tall presents a problem. The physics of moving liquid through thin channels means that the taller a tree gets, the harder it is to pump water from ...

With El Niño expected to affect key socio-economic sectors across the continent, the technical workshop successfully consolidated sub-regional forecasts into a harmonized continental outlook for the ...

No deaths have been reported and the source of the cyclospora infections hasn’t been identified. Meanwhile, investigations ...