Ever wondered how a can of food can outlast basically everything in your fridge? This video breaks down the 200-year-old science behind one of humanity’s greatest survival hacks: canned food.

It all started in 1795 when Napoleon Bonaparte needed a way to keep his armies fed. A French inventor, Nicolas Appert, cracked the code by sealing food in jars and heating them, killing whatever made food spoil. Later, tin cans improved the process, and decades after that, Louis Pasteur finally explained why it worked: microbes.

The secret? An airtight seal + intense heat = total microbial annihilation. No bacteria, no spoilage, no time passing inside the can. Modern techniques even use high-pressure heat to destroy dangerous toxins, making properly sealed canned food safe for years, and sometimes even decades.

So next time you open a can of beans or soup, just remember: you’re not just making dinner, you’re cracking open a tiny, perfectly preserved time capsule.