¿Qué es la materia oscura?

The video discusses dark matter, an unidentified form of matter that makes up about 27% of the universe's mass and energy. Despite its significant presence, dark matter remains invisible as it does not emit or absorb light, making it undetectable through electromagnetic means. However, its existence is inferred through gravitational effects on galaxies and light distortion. The video explains how dark matter affects the rotation of galaxies and presents evidence supporting its existence. Although many theories and experiments aim to uncover its nature, dark matter remains largely mysterious, akin to knowing about a person without ever meeting them.

What observations led to the conclusion that dark matter exists?

What challenges do scientists face in understanding what dark matter is?