Why is the blue whale so big?
Intro What is a blue whale? The blue whale is the biggest animal to ever exist on this planet. It is larger than even the biggest dinosaurs known from the fossil record. It weighs roughly 25 times as much as…
Biology
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Why does your heart beat faster when you get scared?
Intro Has this ever happened to you when you get scared: your heart starts beating faster, you get a sudden rush of energy in your muscles and a feeling of butterflies in your stomach? So why does it happen? It’s…