How do animals find their way when they migrate?
Birds fly thousands of miles to the same place every year. Salmon return to the exact stream where they were born. How do animals navigate over such huge distances without maps or GPS? Do they use the stars, the Earth's magnetic field, smell? How is this even possible?
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3 Answers
I'd recommend the book 'A Brief History of Time' by Stephen Hawking, or for the math side, 'The Joy of x.' Your library has them. They're written for curious regular people. You don't need a degree to understand the big ideas.
The math looks scary but it's mostly just a precise way of saying something you can understand in plain English. Once you get the concept, the equations are just bookkeeping. Focus on the idea first, the symbols second.
Carl Sagan's 'Cosmos' explains stuff like this better than any textbook. If you can find the old TV series or the book, watch or read it. He had a gift for making the universe make sense without dumbing it down. Highly recommend.
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