Deep underground, leftover heat from our planet’s formation and radioactive decay heats up the surrounding rocks and water. We can use this heat to warm our homes or generate electricity! Creation supported by aha.bayern and @wissenschaftsjahr | Kurzgesagt

For millions of years, worms invaded the human body and our immune system turned into a relentless warrior to fight and protect us. But what now? The worms have mostly disappeared, but our immune system is still armed to the teeth to fight them. Could our extremely high immune defenses be the reason for modern allergies? | Kurzgesagt