Question of the Week:
Believe it or not, pretty much all animals shed their skin. Some animals make it a bit more obvious than others. Snakes, and some other reptiles, will often shed all at once.
Instead of shedding their skin in one go, humans actually make and get rid of new skin all the time. It floats away in very small flakes. If you’ve ever had a sunburn, you know skin can shed in bigger pieces, too.
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You’re right. It can take a really long time for some things to decay.
If we buried an apple peel in the backyard it might only take a few weeks to break down into the soil. But if we buried a plastic water bottle, it would probably still be there hundreds of years from now.