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Description
Count Down: How Our Modern World Is Threatening Sperm Counts, Altering Male and Female Reproductive Development, and Imperiling the Future of the Human RaceAuthor Contributor(s): Swan, Shanna H.; Colino, Stacey Publisher: Scribner Date: 02 08 2022 Binding: Paperback Condition: NEW In the tradition of Silent Spring and The Sixth Extinction, an urgent, disturbing, empowering, and essential (Kirkus Reviews, starred review) book about the ways in which chemicals in the modern environment are changingand endangeringhuman sexuality and fertility on the grandest scale, from renowned epidemiologist Shanna Swan.
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.6 ★★★★★
Based on 1207 reviews
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Product Reviews
★★★★★ 5
Great value for money, calculus and linear algebra Calculator
Color: White
Great calculator for Linear Algebra. I’ve been using it for 5 months nearly everyday for hours on end and its battery is still holding up. It comes with a sleeve and made from light plastic that is durable. For a cheap calculator, it pulls its weight in matrices, polynomials, and even graphing. My only gripe with this calculator is the limited vector calculations that make it less than ideal for any sort of physics academics.
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Reviewed in the United States on November 25, 2025
★★★★★ 5
Recommended!
Color: Pink
This calculator model was recommended by the school for math classes, and my daughter has been using it for quite some time now. She's very happy with it and finds it reliable and easy to use. She especially loves that it comes in this color - it's a nice "girly" option that stands out from the usual standard designs.
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Reviewed in the United States on March 20, 2026
★★★★★ 4
Good and convenient.
Color: Black
A great calculator. Simple, has all necessary features, works well and quickly. Great for students and adults alike, works for a long time, responds quickly doesn’t lag. Havent needed to charge it yet- great battery life and screen, even has brightness and zoom options! Even spdurabke enough to hold up to all the times it’s been dropped😅 Overall, a great purchase.
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Good quality
Color: Pink
Good quality. The color is very cute, and I used it for pre-algebra, algebra, and advanced maths, and it does have other modes for other grades, so this would work for grades 6-12. It has lots of features that are required for highschool, so it's nice. It also came with another simpler scientific calculator with works with basic maths and elementary levels. It was worth the buy and I'd do it again. I gave the graphing calculator to my oldest in middle school now going to high school and the scientific calculator to my youngest that is in elementary.
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Reviewed in the United States on July 13, 2025
★★★★★ 5
Best budget graphing calculator
Color: Black
For half the price of The ti-84 plus It can do all things that calculator can do and more.
Let’s start with the design, I really like the design of this calculator. It’s minimalistic, simple, not too distracting but still ha some flair. I like the rose pattern on the back it gives it a nice touch that stands out from other calculators.
For a graphing calculator, It’s easy enough to use of course like with all graphing calculators there is a learning curve. You really need to familiarize with all of the buttons in order to use the calculator properly. I had to look up a lot of YouTube tutorials to get the feel of how the buttons work.
That being said if you do know how to fully use this calculator is very useful. There is a bunch of menus with a lot of features. The notetaking feature is the one I normally use the most. It’s really helpful keeping mathematical equations and formulas for reference later. It really helped me a lot but it comes to test taking. The thing i hate about Texas instruments calculator is when I type in 2xπ, it would just give me 2π without an option to see the decimal answer. This really irritated me as it was something I could’ve easily guessed without a calculator. However with the Casio calculator when I type in the same equation, it gives me a choice to see the decimal answer along side with 2π. In a lot of situations involving pi, this could make or break a problem. I am very glad that Casio allows you to see both answers.
It’s very good value for money. Like I said for half the price of the ti-84 plus, the Casio can do exactly the same things that calculator can do and then some. Great value for money. It’s pretty concerning that Texas instruments has been the the standard calculator in schools and colleges and is required in a lot of classes. Not a lot of people can shell out double the price for the calculator. I hope to see casio being used more in American schools as we need more choice and competition as clearly lack there of.
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Reviewed in the United States on May 12, 2022
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