← All episodes

How is a horse so fast?

Horses · 8 min · published 2026-06-20

A heart the size of a basketball, legs like springs, and a foot that is basically one giant toenail. Moon and Lion dig into how a horse can run 55 miles per hour, then close with the gross and amazing fun facts.

What you will learn

• A horse's heart is about the size of a basketball, and a bigger heart pumps more blood, more oxygen, and more power.
• Horse legs work like springs. Stretchy tendons store energy on every step and release it like a bounce.
• Horses run on their toes. The foot is basically one giant toenail.
• The fastest horse ever recorded ran 55 miles per hour, faster than a car on a street.
• Fun facts: horses cannot throw up, they can only breathe through their nose, they have 10 muscles in each ear, and one horse lived to 62.

Until next time, broccoli heads, eat your broccoli.