The global climate has changed drastically over the course of the 58 years that separate these two photographs of planet Earth.

I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those experiences to help students improve in math through practical applications and tips.

Scientists have warned that the world could be on track for a so-called 'super El Niño', which could push global temperatures ...

Renewable energy is energy derived from natural sources that are replenished at a higher rate than they are consumed. Sunlight and wind, for example, are such sources that are constantly being ...

In an extreme environmental and political climate in the Colombian savannah, one maverick village has relied on its homegrown inventions to survive, down to adapting children's see-saws to draw water ...