I really LOVE this ! It's so interesting!

"Deep beneath our feet, churning molten metals create an invisible shield that holds our atmosphere in place and protects all life from the Sun.

Some animals can sense it directly. Take the quantum effects in a robin’s eye, whales who cross oceans using no landmarks at all, or the bacteria that line themselves up to this unseen force.

Join Professor Hannah Fry and Michael Stevens as they explore magnetism and ponder how a compass knows where to point?

Where the original source our magnetic field came from? What that field might feel like? And why magnets just be the most familiar mystery on Earth."

youtube.com/watch?v=yXg_-2fpg-s

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