It's the highest measurement of carbon dioxide in Earth's air since 1958. It's possible there has not been this much CO2 in our air in more than 3 million years.
Water inside the moon’s mantle came from primitive meteorites, new research finds, the same source thought to have supplied most of the water on Earth.
The greater wax moth is capable of sensing sound frequencies of up to 300kHz – the highest recorded frequency sensitivity of any animal in the natural world.