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Human activities are causing an “alarming” decline in biodiversity that is endangering food security, clean water, energy supplies, economies, and livelihoods for billions of people worldwide, according to a new United Nations-backed study by 550 scientists, conservationists, and policy experts from over 100 countries.

Climate change and other environmental factors are more threatening to fish diversity than predators, according to new research from the University of Guelph.

NASA satellite imagery showed that Tropical Cyclone Nora developed an eye as it strengthened into a hurricane north of Australia. NASA-NOAA's Suomi NPP satellite provided forecasters with a visible image of the storm, formerly named Tropical Cyclone 16P.

Achieving water quality goals for the Gulf of Mexico may take decades, according to findings by researchers at the University of Waterloo.

The results, which appear in Science, suggest that policy goals for reducing the size of the northern Gulf of Mexico’s dead zone may be unrealistic, and that major changes in agricultural and river management practices may be necessary to achieve the desired improvements in water quality.

The timing of the Middle Pleistocene glacial-interglacial cycles and the feedback mechanisms between climatic shifts and earth-surface processes are still poorly understood. This is largely due to the fact that chronological data of sediment archives representing periglacial, but also potentially warmer climate periods, are very sparse until now.