Oxygen in the atmosphere and ocean rose dramatically about 600 million years ago, coinciding with the first proliferation of animal life. Since then, numerous short lived biotic events — typically marked by significant climatic perturbations — took place when oxygen concentrations in the ocean dipped episodically.
There’s a lot of debate in the horror world about found footage, which has practically become a genre in itself.
The moon could be a highly toxic place, say scientists, warning of cancer and breathing problems even when astronauts remain in their space suits.
Waste water treatment could actually be increasing the amount of some toxins, by transforming common pain-killing drugs into more dangerous forms.
Queen’s University researchers have discovered that nanoparticles - now found in everything from socks to suntan lotion - may be causing irreparable harm to soil systems and the environment.
A University of Missouri researcher says it's possible to replace nearly all of the toxic chemicals required to make gold nanoparticles - with cinnamon.