The perfect visual guide to temperature scales that no textbook will ever include. 21°C is hammock weather, while 21°F freezes Squidward solid. Meanwhile, 21 Kelvin? Still frozen, because that's -252°C and would literally shatter most materials. At 69°C, Squidward is literally on fire, but at 69°F he's back to hammock lounging. 69 Kelvin? Still a squid-sicle. The punchline comes at 295 Kelvin (room temperature), where our cephalopod friend finally gets to relax, while both 295°C and 295°F have him combusting. This is why scientists prefer Kelvin—no negative numbers, just the sweet certainty of knowing exactly how much atomic jiggling is happening.