If you take a video of a spinning wheel, you’ll probably notice that the spokes appear to turn more slowly than the wheel is actually rotating, and sometimes in the wrong direction. This is caused ...

The apocalyptic red skies in Western Australia have generated considerable international media attention. Crimson dust whipped up by the strong outer winds of Severe Tropical Cyclone Narelle created ...

Colour vision is an integral part of the human visual system. It relies on the presence of three types of cone photoreceptor in the retina, which have different but overlapping wavelength tuning ...