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Ships within 48 hours · Estimated delivery Jun 30 - Jul 5
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Description
The Secret Life of EquationsBehind every important scientific discovery there is an equation. They are far from baffling, and now you too can understand their power and beauty! Discover the 50 equations that have led to incredible discoveries, ground breaking technology, and have shaped our understanding of the world. From much heralded classics as e=mc and Pythagoras's Theorem, to Fuzzy Logic and Google PageRank, each equation is tackled head on, broken down, and explained in a
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- We offer a 30-day return/exchange service after receiving.
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.0 ★★★★★
Based on 1625 reviews
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Product Reviews
★★★★★ 5
Dog approved
Color: Colorful, Size: Medium
Favorite bag for my dog
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
★★★★★ 5
Repeat buyer
Color: Colorful, Size: Medium
This lasts a long time. We have a bigger one outside and smaller in east for dog to grab and us
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
★★★★★ 1
Not as described
Color: Colorful, Size: Large, Color: Colorful, Size: Large
This item is vibrant in color, but I could tell right away, It wasn’t going to be durable and indestructible like the description said. My dog had it destroyed in less than a minute.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Great play for everyone
Color: Colorful-2, Size: Medium, Color: Colorful-2, Size: Medium
We have Shelties and they love it!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
★★★★★ 5
Here’s that ball we need!
Color: Colorful, Size: Medium, Color: Colorful, Size: Medium
Our Blue Heeler loves this ball, the tabs are easy for her to grab and entertain herself. Great toy
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2026
