Our eyes are typically closed when we ... More information: Manuel Carro-Domínguez et al, Pupil size reveals arousal level fluctuations in human sleep, Nature Communications (2025).

MIT engineers have made a breakthrough in this area—they’ve developed a method to grow muscle tissue that contracts in ...

They also tend to have pupils that open more widely in low light. So, at the outset, nocturnal eyes gather more light than human eyes do. After the light passes through the pupil, it is focused by ...

When evolution skeptics want to attack Darwin's theory, they often point to the human eye ... the separate parts of the eye -- the lens, the retina, the pupil, and so forth -- since none of ...

Human eyes are actually spheres. The part that we can see is only just the front. That coloured circle is called the iris and the black spot in the middle is the pupil. This is the part of the eye ...

pupil movement might one day be used to detect disorders such as insomnia and post-traumatic stress disorder, or even a comatose patient’s recovery. We haven’t yet figured out if eyes are ...

Scientists at MIT have created a new kind of artificial muscle that can flex and move in multiple directions, much like real ...

MIT engineers developed a method to grow artificial muscle tissue that twitches and flexes in multiple, coordinated ...