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Description
Gravity’s CenturyA sweeping account of the century of experimentation that confirmed Einstein's general theory of relativity, bringing to life the science and scientists at the origins of relativity, the development of radio telescopes, the discovery of black holes and quasars, and the still unresolved place of gravity in quantum theory. Albert Einstein did nothing of note on May 29, 1919, yet that is when he became immortal. On that day, astronomer Arthur Eddington
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.7 ★★★★★
Based on 120 reviews
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Product Reviews
★★★★★ 5
Great
Style: Boka 3.0
For the cost, this is a great product. Works amazingly well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 6, 2026
★★★★★ 5
Got more than I expected
Style: Boka 3.0
This is my first sonic toothbrush. I am very impressed with it. Like all the options it has and the look of it. It takes up a very small footprint and came with a vented brush cover. Their toothpaste and other products are excellent!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
★★★★★ 5
Keep plastic out of your brain
Style: Boka 3.0
Keep the plastic out of your gums and thus out of your bloodstream, and even your brain. It has been prove that plastics pass the blood brain barrier an deposit into your brain. Help slow that down with this toothbrush.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
★★★★★ 5
great
Style: Boka 3.0
Very high quality toothbrush and with the boka tooth paste makes my teeth feel clean
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2026
★★★★★ 4
Love this
Style: Boka 3.0
Love the style and quality, but wish the charging station was more secure.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 29, 2025
