How do diesel-electric submarines work?

Learn more about the different types of propulsion systems used in submarines.
What are the advantages of a diesel-electric sub?


Learn more about the submarine that went missing



Isotopes and Atomic Mass – Learn more with the Phet Interactive Simulation

Isotopes and Atomic Mass

Click to Run


The problem with anabolic compounds – how do they work?

The World Anti-Doping Agency (WADA)  is concerned with the two state sanctioned doping events by Russia athletes.

Anabolic Agents

Anabolic agents are the biggest class of prohibited drugs at the Olympics, and they’re also the most frequently detected. In 2014, the World Anti-Doping Agency found that 48% of positive tests were due to the use of anabolic agents. Their list of prohibited substances names around 74 different agents, but also includes any substances with similar chemical structures.

Anabolic steroids are the major group of drugs included in this class. They are structurally similar to the natural human hormone, testosterone, and when taken mimic its effects. As such, they are used by athletes to help them increase their muscle mass and physical strength. Commonly, they’re taken in the run-up to competitions, rather than during the competition itself. This would make them harder to detect with testing at the Olympics alone, which is why out-of-competition testing also takes place. With that said, recent research has found that steroid metabolites persist in the bodies of those using them for several months, making them easier to detect.

Learn more about the use of chemistry in sports:

How to increase sustained attention when your attention has been hi-jacked?

Learn how to increase your attention span
Learn more about how to increase test performance
Brain Drain: The Mere Presence of One’s Own Smartphone Reduces Available Cognitive Capacity

Adrian F. Ward, Kristen Duke, Ayelet Gneezy, and Maarten W. Bos

we test the “brain drain” hypothesis that the mere presence of one’s own smartphone may occupy limited-capacity cognitive resources, thereby leaving fewer resources available for other tasks and undercutting cognitive performance. Results from two experiments indicate that even when people are successful at maintaining sustained attention—as when avoiding the temptation to check their phones—the mere presence of these devices reduces available cognitive capacity.

Games as metaphor – how to build a game that uses game mechanics to teach you the meaning behind the game

Game Mechanics


The following images are game cards that are designed to teach the concept of evolutionary theory:

Happy Birthday to Marie Curie

Learn more about why Marie Curie’s birthday is an event worth celebrating!

Large Scale, Stable “Redox-Flow” Batteries using Vanadium have the potential to reduce pollution

Learn more about Redox Flow batteries:

The missing Link to renewable energy