Natural Wonders | Heather Wall | Substack

What can brown (fat) do for you?

The only kind of fat I want more of…

Jan 7 • Heather Wall

How does altruism show up in the natural world?

Why would an animal sacrifice itself?

Dec 24, 2025 • Heather Wall

Why does my dog eat grass?

Wouldn’t you know that just a few days after I wrote about why we can’t lick our wounds like dogs can, Toby injured his foot somehow.

Dec 10, 2025 • Heather Wall

What is the rarest color in nature?

And why aren’t there any green seashells?

Nov 26, 2025 • Heather Wall

Why can’t we lick our own wounds?

Animals do it, should we?

Nov 12, 2025 • Heather Wall

Natural Wonders

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