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Description
RADIUS Original Left-Hand Toothbrush | Soft Bristles & Gum HealthThe RADIUS Original is the toothbrush that started it all. This luxurious left hand version blends form with function, approved by the American Dental Association for gingivitis prevention and plaque removal. Its iconic design earned a place in the Smithsonian Institute National Design Museum. SUPERSIZED BRUSH HEAD FOR SUPERIOR CLEANING: The wide oval brush head is designed to improve gum health and can even reduce the risk of gum and heart disease by
The RADIUS Original is the toothbrush that started it all. This luxurious left-hand version blends form with function, approved by the American Dental Association for gingivitis prevention and plaque removal. Its iconic design earned a place in the Smithsonian Institute National Design Museum.
- SUPERSIZED BRUSH HEAD FOR SUPERIOR CLEANING: The wide oval brush head is designed to improve gum health and can even reduce the risk of gum and heart disease by massaging the whole mouth — leaving you with that tingly-fresh feeling.
- AWARD-WINNING “EASY-GRIP” DESIGN: The Original’s user-friendly handle complies with the dentist-recommended 45-degree brush-to-tooth angle and the smart Thumb-and-Palm design makes it much easier to grip and control.
- 3X MORE BRISTLES: Not only are there more of them, the Original’s mass of bristles are softer and more uniquely aligned, providing even pressure that helps reduce chronic bleeding, receding gums and enamel erosion.
- GOOD FOR RIGHTIES AND LEFTIES: The RADIUS Original’s ergonomic design comes in right- and left-handed versions, so everybody can enjoy a luxurious teeth-cleaning experience.
- SUSTAINABLE FROM THE START: From the cellulose handle sourced from renewable timber, to the vegetable-based nylon bristles, the RADIUS Original is 100% petroleum free.
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4.4 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Delightful and thought-provoking!
Format: Audiobook
Absolutely delightful and thought-provoking Audio book, read by Tyson himself. (An excellent companion volume to Hegseth’s “Take me to Your Liter”. )
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Reviewed in the United States on May 25, 2026
★★★★★ 5
Quick read, entertaining & informative
Format: Hardcover
This book can be enjoyed on several levels. It could be tongue-in-cheek or satire, but is also backed by facts and conjecture by one of the world’s greatest scientific thinkers. I think Dr. Tyson had fun writing it, and i certainly had fun reading it. And I learned a lot.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Aliens: Know what to expect!
Format: Audiobook
This is a really fun review of Earth's obsession with alien life, what we have historically expected of aliens--and what they might expect of us.
If you are a long-time listener of the author or a viewer of his YouTube show (Star Talk), you have probably heard much of what NDT has to say on this subject already--here and there as he picks his way thru the universe, but why not listen to him now again as he focuses his energies on just this alien subject? If you want an enjoyable read, it will be worth your time. If you're not a long-time listener of NDT... and you have any interest in aliens at all, then you DEFINITELY should give this book a go. It is full of thoughtful insights from a man who has devoted his life to the science and 'cultural impact' of the stars.
I listened to the Audible version wherein NDT reads his own book aloud for you. His efforts really allow you to gain his insights... And his strong sense of humor--in equal doses.
5 Stars
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Reviewed in the United States on May 12, 2026
★★★★★ 5
My son is actually motivated to do a workbook
Format: Paperback
My Kindergartener finished homeschool online early and we have been doing a page a day and he loves it and loves to earn a sticker after each day and put it on his chart. I love how engaging the workbook is and how it introduces some 1st grade concepts. Would highly recommend.
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Reviewed in the United States on January 23, 2026
★★★★★ 5
Excellent Kindergarten prep
Format: Paperback
My daughter is loving all of the learning exercises and has started feeling more confident heading in to Kindergarten.
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Reviewed in the United States on May 20, 2026