Purple is the new green, as far as aliens are concerned, anyway. If you were asked to imagine an alien planet, it would be reasonable to imagine a green earth-like rock orbiting somewhere in a distant ...

What would Earth look like if it were orbiting a different star? Our very existence is shaped by the amount of light and radiation we receive from the Sun. If Earth were to orbit around a different ...

The human brain is remarkably good at adjusting to different light conditions. Think about wearing a pair of tinted sunglasses: At first, the tint is noticeable, but after a while, colors begin to ...

As an astrobiologist, I often get asked how aliens would look. What people usually mean by “aliens” are complex, animal-like aliens—often humanoid in form. From the natural history of life on our own ...