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The frequency of downpours of heavy rain—which can lead to flash floods, devastation, and outbreaks of waterborne disease—has increased across the globe in the past 50 years.

A team of researchers led by the University of California San Diego have discovered what’s responsible for making the teeth of the deep-sea dragonfish transparent. 

We’ve learned bees can understand zero and do basic maths, and now a new study shows their tiny insect brains may be capable of connecting symbols to numbers.

Earth’s outer layer is composed of giant plates that grind together, sliding past or dipping beneath one another, giving rise to earthquakes and volcanoes. These plates also separate at undersea mountain ridges, where molten rock spreads from the centers of ocean basins.

From the Ironman triathlon to the Tour de France, some competitions test the limits of even the toughest endurance athletes.