Colours and language — how the two influence each other

There are as many colours as you can name. In some cultures, like Africa’s Himba tribe, they can only name five colours, for instance.

Chile just signed the cheapest unsubsidized power in the world at ¢2.91/kWh. Of course, it’s solar energy

There are absolutely no subsidies which means this is the cheapest power plant in the world.

Cassini finds canyons flooded with liquid hydrocarbons on Titan

NASA’s ever-resourceful Cassini probe found steep-sided canyons on Saturn’s moon Titan.

Flossing might be useless: little evidence showing it keeps teeth and gums healthy

Have we been living a lie all this time?

Why we get dark circles around the eyes

Fatigue is often what causes dark circles around the eyes, but there’s more to it.

Early childhood stunting costs developing countries $177 billion/year

Developing countries stand to lose $177 billion each year or about half a percentage point of GDP due to delays in the physical development of children.

Can this planet survive humans 50 years from now?

Let’s face it — we haven’t taken care of this planet as well as we should.

Caffeine is essentially useless after three sleep-deprived nights

After only three nights of sleeping five hours or less, caffeine stops working.

Vaccines work: only 15 polio cases in 2016. In 2020 it should be eradicated

The wild poliovirus is about to go extinct. In 2015, only 74 new cases were reported or 80 percent less than in 2015. Furthermore, these cases were contained in two countries: Afghanistan and Pakistan.

Half of sunscreens might disrupt sperm function

Women who use certain sunscreens might be at risk of infertility, as scientists found 45 percent of the tested products contained chemicals that mess with the function of sperm.