Full Screen Mario
Grow your neuron as long as possible by clicking on protein targets.
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10 Instant Emotional Fitness Tools
10 Tools to help you regain your emotional balance.
Eating 10 hot dogs in 6 minutes and belching the national anthem may impress your friends, but neither of those feats will do much for your body—at least not much good. Instead, why not train yourself to do something that may actually pay ...
Touch Mathematics | Trigonometry
A collection of free, web browser-based apps that aim to make mathematics intuitive for learners of all ages.
Sorry Deniers, Global Warming Is Very Real
Free Summarizer, an online automatic tool to summarize any...
Free online tool to automatically summarize any text in a few clicks.
Color — Method of Action
A color matching game
Do Nothing for 2 Minutes
I just did nothing for 2 minutes. Can you?
Cell Size and Scale
The smallest objects that the unaided human eye can see are about 0.1 mm long. That means that under the right conditions, you might be able to see an ameoba proteus, a human egg, and a paramecium without using magnification. A magnifying glass can h...
The Scale of the Universe 2
Zoom from the edge of the universe to the quantum foam of spacetime and learn about everything in between.