Zhi Li

In the dense star cluster NGC 6791, which is older than the Sun and rich in heavy elements, the light from many stars blends into a common glow. Astronomers set out to disentangle this light into individual stars using data from the Gaia space telescope.

Every day, the brain sounds a little different. Yesterday, the thought of moving your left hand produced one pattern of electrical waves; today, it's slightly different. For a brain-computer interface (a device that turns mental commands into actions), this is a big problem: yesterday's settings don't work today.