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Description
Trouble with Gravity: Solving the Mystery Beneath Our FeetWhat is gravity? Nobody knows and just about nobody knows that nobody knows. How something so pervasive can also be so mysterious, and how that mystery can be so wholly unrecognized outside the field of physics, is one of the greatest conundrums in modern science. But as award winning author Richard Panek shows in this groundbreaking, mind bending book, gravity is a cold case that's beginning to heat up. In The Trouble with Gravity, Panek invites the
What is gravity? Nobody knows--and just about nobody knows that nobody knows. How something so pervasive can also be so mysterious, and how that mystery can be so wholly unrecognized outside the field of physics, is one of the greatest conundrums in modern science. But as award-winning author Richard Panek shows in this groundbreaking, mind-bending book, gravity is a cold case that's beginning to heat up. In The Trouble with Gravity, Panek invites the reader to experience this ubiquitous yet elusive force in a breathtakingly new way. Gravity, Panek explains, structures not only our bodies and our physical world, but also our minds and culture. From our very beginnings, humans' conceptions of gravity have been inextricably bound to our understanding of existence itself. As we get closer and closer to solving the riddle of gravity, it is not only physics that is becoming clearer. We are also getting to know ourselves as never before.Binding Type: Paperback
Publisher: Mariner Books
Published: 07/07/2020
ISBN: 9780358299578
Pages: 256
Weight: 0.50lbs
Size: 7.90h x 5.20w x 0.80d
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4.0 ★★★★★
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Product Reviews
★★★★★ 5
Good quality
Size: 3.5" (Medium/Large Dog), Color: Set of 6
The dogs absolutely love the way they bounce and squeak
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Reviewed in the United States on April 1, 2026
★★★★★ 5
An absolute must have in our house
Size: 2.5" (Small Dog), Color: Blue+Orange+Green
We have a couple of miniature Aussies. One is more of a snuggler, but the other is addicted to playing fetch and these balls are her favorite! Perfect amount of bounce and squeak. Perfect size for her mouth and a great value. Very durable too.
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Reviewed in the United States on May 4, 2026
★★★★★ 5
loud but in a good way
Size: 4.5"
Love these crazy loud squeeky balls. I bought two a bit too big but the dogs still love them. Yes, they will drive you insane but the dogs love them so much it's worth it watching the pups enjoy the balls. They are strong and safe as long as they aren't too small for your dogs mouth.
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Reviewed in the United States on May 2, 2026
★★★★★ 5
Great for aggressive chewers - Great for clean teeth
I never thought these would stand up to my 60lb pittie puppy's chewing. But they are far and away her favorite toy and are holding up beautifully. One squeaker insert bit the dust -- which is not bad since it gives us one silent one. But otherwise they are holding up superbly to her powerful jaws. We have tried a lot of toys. So far, all the "for aggressive chewers" toys have been torn apart within days if we are lucky -- usually it's minutes. But these balls show little-to-no sign of wear. The squeakers are very loud which she loves can get a bit tiresome. So, as I mentioned, having one silent one is a great option. And she really likes the texture. She loves them so much, we bought a second set and will probably buy a third to have in reserve. (We are realistic and don't expect them to last forever.) All I have to say is "where's spiky ball" and she instantly stops what she is doing and goes on the hunt. A great buy!! (NOTE: It's been almost three months and one is just beginning to show some damage. Given that she plays with them non-stop, they've showed amazing durability. And everyone comments on how clean and beautiful her teeth are. I don't brush them or give her dental treats. So it has to be these balls!!)
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Reviewed in the United States on June 23, 2025
★★★★★ 5
Good sturdy ball for aggressive chewer
Size: 4.5"
Nice heavy duty ball that my 7 yr old pitbull can chew on and not destroy it in 2 minutes. Wish that could get 3 for the cost but whatever. Nice bright colors . Good size that he won't choke on it .
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Reviewed in the United States on March 30, 2026