What if the atmosphere was full of helium instead of oxygen?

Imagine stepping outside and taking a deep breath, only to find your voice suddenly transformed into a comical, high-pitched squeak. Welcome to a world where helium, not oxygen, fills our atmosphere. In this bizarre alternate reality, everyday life would be turned upside down. From the way we speak to how we move, everything would change dramatically. Birds would struggle to fly, fires would burn differently, and our voices would perpetually sound like we've just inhaled from a party balloon. But the consequences go far beyond mere amusement. How would this helium-rich environment affect our bodies, our technology, and even our planet's climate? Join us as we dive into this fascinating "what if" scenario and explore the mind-bending implications of a helium-filled world.