The 5 Most Energy-Dense Substances in the Universe

[00:00:00]Forget watts and joules. Let's rank the universe's most powerful fuels in one unit you already know, the food calorie.

[00:00:08]Five substances from your kitchen to deep space. Number one isn't even on Earth. We build it atom by atom. Number five, fat, butter, oil, lard. Nine calories per gram, the densest fuel your body can burn. That's why 1 Tbsp of olive oil hides 120 calories. Food can't pack energy tighter than this. So, we leave the kitchen. Number four, gasoline. Roughly 11 calories per gram and it moves a billion cars. 1 L of this stuff holds the calories of nearly 20 Big Macs burned in seconds, not digested over days. Number three, hydrogen, the lightest element, the king of chemistry.

[00:00:50]Around 34 calories per gram, triple gasoline by weight. It's why rockets drink liquid hydrogen. No chemical fuel packs more energy per gram. To beat you split the atom. Number two, uranium.

[00:01:03]Split its nucleus and 1 g releases over 20 million calories, 2 million times more than gasoline. A single uranium pellet, the size of a fingertip, can power a home for years. Chemistry can't compete. Only physics goes higher and it does go higher by nearly a thousand times. Everything so far was just a warm-up. Number one, antimatter. When it touches normal matter, both vanish. 100% of their mass turns to pure energy.

[00:01:32]That's roughly 20 billion calories per gram, the densest fuel allowed by the laws of nature. 1 g would release the energy of a Hiroshima bomb. Nature stores none of it. We forge it inside colliders. From a pat of butter to a particle that erases itself, the same calorie scaled across nine orders of magnitude.