Ever seen a heart come to life? Scientists just dropped a timelapse video of cardiac cells literally assembling a mouse heart from scratch—and it’s wild. Using a fancy light-sheet microscope, they tagged the cells with glowing markers and watched them move, divide, and somehow just ‘know’ where to go. Turns out, these cells have a secret plan way earlier than anyone thought. It’s not just mesmerizing to watch, it could totally change how we understand heart defects! #ScienceIsCool #HeartDevelopment #TimelapseMagic #Health