In labs around the world, plastic bags of green water are quietly basking in sunlight. The water’s filled with what’s commonly known as ‘pond scum’. Its official name is green algae- a tiny, unicellular organism found in ponds, rivers and oceans worldwide. It looks slimy,... more

Thomas Edison, whose 164th birthday is today, began the electrical age in New York City in 1882 when he turned on electric lights in 58 houses. Within years, his electricity grid had grown to send electricity to thousands, and was the model that we use today to send power to billions worldwide... more