A gravitational lens—a cosmic magnifying glass—helped spot a strange dark object. Inside it, a black hole likely lurks, and the surrounding dark matter is evenly distributed, contradicting conventional theories. Perhaps dark matter particles interact more strongly with each other than previously thought.
🎯 Einstein predicted gravitational lenses back in 1912, but thought the effect would be unnoticeable. Today, it's our main tool for 'weighing' the invisible.