It is hard to represent our spherical world on flat piece of paper. Cartographers use something called a "projection" to morph the globe into 2D map. The most popular of these is the Mercator projection. Every map projection introduces distortion, and each has its own set of pr…
This harm reduction tool helps to detect dangerous and lethal interactions in substance combinations.
Welcome to NASA's Eyes, a way for you to learn about your home planet, our solar system, the universe beyond and the spacecraft exploring them.
We publish activity books containing exciting puzzles and brainteasers every day! Our books are free to download and share.
You can track sharks from all over the world, and follow their movement from the latest satellite ping attached to them. OCEARCH is a global non-profit organization conducting unprecedented research on our ocean's giants in order to help scientists collect previously unattainabl…
For every student, every classroom.
Real results. We’re a nonprofit with the mission to provide a free, world-class education for anyone, anywhere.
Leading online education from top universities.
Coursera offers career-advancing courses and degrees from the world's best universities like the University of Illinois, Yale, and the University of London, 100% online.
Explore thousands of hands-on creative classes.
Third most popular repo on GitHub with 234k stars. Free ebooks in many languages, covering a lot of subjects related to programming.
Simply scroll down and dive beneath the ocean, see what lives under different depths and conditions.
CryptoZombies is an interactive code school that teaches you to write smart contracts in Solidity through building your own crypto-collectables game. The course is beginners friendly and is available for free (no strings attached!).
Learn various programming languages, for free. If you are a programmer, you probably came across this website multiple times through Google.
The graphing calculator that makes learning maths easier Ergonomic, open source and evolutive, the NumWorks graphing calculator is designed for today’s needs with today’s technologies. NumWorks makes learning maths easier for everyone: professors or students… and it perfectly su…
Online web tool for calculating the centroid of triangle and polygon. You can also calculate the centroid of multiple points easily by entering multiple points. The input in taken in x and y coordinates of cartesian system. Calculate with just one click.
Learn something new in just 5 minutes, with daily bite-sized knowledge from books, articles, videos, podcasts & more.
Write concisely by substituting "very" + "adjective" with a more concise adjective that has the spirit of very contained within it.
With the help of unit circle calculator you can calculate the sine, cosine, and tangent for an angle and also find the co-ordinates on the unit circle.