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Description
The Eclipse of 1919: How Einstein's Theory of General Relativity Changed Our WorldFrom his earliest days as a child, Albert Einstein was fascinated with the relationship between light and gravity. He couldn't stop thinking about the laws of the universe, and was determined to describe how motion and time, and energy and mass, all worked together. Einstein imagined gravity as what happens when objects bend the space and time around them. But this theory couldn't be perceived in the everyday world. To test his hypothesis, Einstein
From his earliest days as a child, Albert Einstein was fascinated with the relationship between light and gravity. He couldn't stop thinking about the laws of the universe, and was determined to describe how motion and time, and energy and mass, all worked together. Einstein imagined gravity as what happens when objects bend the space and time around them. But this theory couldn't be perceived in the everyday world. To test his hypothesis, Einstein needed to see if the sun's gravity bent the light from a nearby star. And the only way to do that was to photograph a total solar eclipse. This is the story of how scientist Arthur Eddington validated Albert Einstein's theory of general relativity, permanently altering the world's understanding of the universe and beyond. It's a testament to the relationship between nature, science, and the pursuit of knowledge.Author: Emily Arnold McCully
Publisher: Christy Ottaviano Books-Little Brown and Hach
Published: 07/29/2025
Pages: 40
Binding Type: Hardcover
Weight: 1.00lbs
Size: 11.20h x 8.70w x 0.50d
ISBN: 9780316475525
Audience: Ages 9-12
Review Citation(s):
School Library Journal 05/01/2025 pg. 138
Booklist 06/01/2025 pg. 66
Horn Book Magazine 07/01/2025 pg. 118
Hornbook Guide to Children 07/01/2025 - Superior,Well Above Average
About the Author
Emily Arnold McCully has illustrated many award-winning books for children, including Mirette on the High Wire, which received the Caldecott Medal; Dreaming in Code: Ada Byron Lovelace, Computer Pioneer, which received starred reviews from School Library Journal and The Bulletin; and Caroline's Comets. Emily divides her time between New York City and Austerlitz, New York, where she was able to experience the 2024 total eclipse in her backyard. She invites you to visit her online at emilyarnoldmccully.com.
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4.8 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
My dog liked it
Flavor Name: Bacon - Kit
Easy to use and my dog liked it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 23, 2026
★★★★★ 5
Lo recomiendo
Flavor Name: Bacon - Kit
Muy útil, para la limpieza dental de mi perrita. Y el sabor del producto le encantó.
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Reviewed in the United States on March 15, 2026
★★★★★ 5
My favorite toothbrush for my fur babies!
Color: Pink (2-pack)
I think these brushes are the easiest way to brush your fur babies teeth. I can get into their mouths and really see in there and brush each tooth and make sure the tarter is off. They even assist by trying to bite the brush and I use toothpaste for dog and gently brush back and forth first the front teeth then the side teeth then the inside teeth and the top of the teeth then the inside of the bottom and top teeth and I end with the left inside top and bottom teeth. I use vanilla mint toothpaste for dogs because my dogs are allergic to proteins. Their teeth look so white and their vet comments that their teeth look so great and clean. She does want them of course to have their yearly cleaning but she said there is no rush because their teeth are so clean and she sees no dental disease. I make sure that I wash the brushes daily with soap and keep them open after use otherwise mold will grow on them if you shut them in the case they come in. My pups weigh 6 lbs and 7 lbs and are Maltese females. They cooperate fully with me brushing their teeth because I started when they were puppies and now they are one and two years old. These brushes are lightweight and not expensive at all. I usually buy several at a time to make sure I have clean ones on hand just like you would change a human toothbrush monthly. Each pup gets its own toothbrush and I label the case for each with a marker. I like these better than a regular toothbrush because it’s 360 degrees and the pup can chew on it without hurting themselves or the bristles coming off. Highly recommend!
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Reviewed in the United States on May 2, 2026
★★★★★ 5
Dog Approved - Highly Preferred Over Standard Toothbrush
Color: Neon (4-pack)
These pet finger tooth brushes work well for me and my dog. He most definitely tolerates these so much more than a standard tooth brush. I believe I am able to reach more of his teeth and that I'm more effective brushing with these than I am with a standard brush. I put one on each of my index fingers. This makes it easier to do each side and the top and bottom without having to twist and turn to reach everything. The size is just right for my index fingers. They are a little tight getting them on and I have found that wetting my finger and the inside of the finger brush makes it a lot easier to put them on. The bristles on the finger brushes are soft, yet they are durable enough to give some good scrub quality and gum massage. These are a good price for what you get. I purchased the four-pack at right about $16.00. I have gotten numerous uses so far out of the two that I have been using. I will definitely purchase these again when it is time.
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Reviewed in the United States on July 13, 2025
★★★★★ 4
Probably Best for Medium-Large Size Dogs
Color: Blue (2-pack)
This finger cot–style toothbrush works well and is a simple way to brush your dog’s teeth, especially if they’re not comfortable with a traditional toothbrush. The material is soft yet effective at cleaning, and it gives you good control while brushing.
The only drawback is that it’s a little large for my miniature Dachshund’s mouth, making it somewhat difficult to reach all areas comfortably. It would probably be a better fit for medium or larger dogs. Even so, it gets the job done and is a good option for introducing dogs to regular dental care.
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Reviewed in the United States on May 31, 2026
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