In 2017, the wealth of the world’s 500 richest people rose by $1 trillion, or 23%. World income inequality is now at its highest for 100 years.
The cost of global natural disasters in 2017 is estimated at $306 billion – almost double that of 2016.
The temperature in the Arctic circle is currently rising three times faster than the rest of the world.
New research by the University of Arizona estimates that US nuclear testing between 1951 and 1973 killed up to 690,000 Americans.
30 years after Prozac was approved by the US Food and Drug Administration, we still don’t know how it works and rates of depression are higher than ever.
New species discovered in 2017 include an electric blue tarantula, a grass that tastes like salt and vinegar crisps and an orchid that smells like champagne.