Cosmology
Strange observations of galaxies challenge ideas about dark matter
A new look at how light bends as it travels through the universe could point to an alternative theory of gravity.
A new look at how light bends as it travels through the universe could point to an alternative theory of gravity.
For some, it’s the stuff of nightmares. But a grad student’s serendipitous cell phone video might resolve a long-running debate over leech acrobatics.