Science
fromNature
1 week agoDaily briefing: Animals without brains sleep too - hinting at why we sleep at all
Jellyfish exhibit sleep-like states remarkably similar to human sleep despite lacking a brain.
More than 100 galaxies can be seen in Galaxy Cluster Abell 209, situated about 2.8 billion light-years away. Though they look close to one another, these galaxies are still separated by millions of light-years. Their combined mass manages to warp and magnify some even more-distant galaxies through a process called gravitational lensing. Lensed galaxies here appear stretched or streaky toward the center.