Technology
What Is a Sensor? Types, How They Work, and Examples
November 9, 2026
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Technology
What Is a Sensor? Types, How They Work, and Examples
November 9, 2026
Technology
20 Facts About Biomedical Engineering Worth Knowing
November 9, 2026
Physics
Examples of X-rays: 10 Types and What Each One Shows
November 9, 2026
Geology
Volcanoes in Virginia: Two Extinct Sites and Where They Are
November 9, 2026
Before you buy
Books and gear for science readers, students and classrooms, with the specs and editions checked for every pick.
Best Chemistry Set for Kids
Chemistry sets by age: kitchen chemistry from 5, real chemicals from 10, Thames & Kosmos C-series for teens, plus a safe first-session setup.
Best Science Gifts for Kids
A seven-question gift quiz plus picks by age from 3 to teens: real microscopes, Snap Circuits, geodes, telescopes, coding robots, games and books.
Best Gifts for Chemists
Eighteen gifts chemists actually want: a glass coffee siphon, element cubes, a tungsten cube, an anti-static gun, student tools and the best chemistry books.
Free to print
Periodic tables, conversion charts and worksheets as free PDFs in US Letter and A4, with answer keys for the quizzes.
Weight Conversion Chart
Kilograms to pounds and pounds to kilograms for every body weight, plus ounces, grams and a units table.
Height Conversion Chart
Feet and inches to cm and cm to feet and inches, from 4 to 7 feet, with meters on every row.
Printable Periodic Table
Free periodic table PDFs in color, black and white, blank with a key, kids and an element list, plus a build-your-own customizer.
Fresh from the lab
Scientists
Scientists Born in Uruguay: 12 Names and What They Did
Uruguay has about 3.4 million people, one dominant public university, and a surprisingly deep bench of scientists. Scientists…
November 9, 2026
Chemistry
Examples of Oxides by Type, With Formulas and Uses
An oxide is a compound made of oxygen and one other element, where oxygen sits in the −2…
November 9, 2026
Physics
Benefits of Physics: What You Actually Get From Studying It
Table of Contents TLDR The benefits of physics fall into four groups: a transferable problem-solving skill set, a…
November 9, 2026
Physics
Examples of States of Matter, From Ice to Neon Signs
Quick answer: examples of each state State Everyday examples What the particles do Solid Ice cube, wooden spoon,…
November 9, 2026
Chemistry
Best Chemistry Set for Kids: 12 Picks by Age, 5 to Teens
A parent and geoscientist picks the best chemistry set for kids at every age, from kitchen chemistry at…
November 9, 2026
Science
Best Science Gifts for Kids: Quiz and Top Picks by Age
The best science gift for a kid is one rated for their age that matches what they are…
November 8, 2026
Chemistry
Best Gifts for Chemists: 18 Chemistry Gifts Chemists Actually Want
The best gifts for chemists and chemistry students: a glass coffee siphon, element cubes, a tungsten cube, an…
November 8, 2026
Science
Best Science Kits for Adults: 13 Kits I Actually Use at Home
The best science kits for adults, from a serious chemistry set to a Geiger counter, a Stirling engine,…
November 7, 2026
Physics
Best Breadboard Kit: 11 Picks for Beginners, Arduino and Raspberry Pi
The best breadboard kits for beginners, Arduino, ESP32 and Raspberry Pi, plus the breadboard and jumper wire that…
November 7, 2026
Why we publish
33Science is an independent publication exploring the natural world — from the chemistry of a single crystal to the life cycle of a star. Clear, curious and rigorously sourced, for readers of every background.
