What's better: Real Christmas trees or artificial ones?

What can a well-manicured lawn reveal about social status, our relationship to the Earth and the American Dream? A surprising amount. From fancy French palace gardens to suburban America, come along for the garden party as we mow over the history of the lawn – and ask if its time…

More and more cities are switching to LEDs to save money and, ultimately, the planet. But ecologists are worried about this trend. Dr. Chris Kyba explains why on a night walk through Cologne, one of Germany's brightest cities.

In the heart of Berlin, woodpeckers are turning the city into their playground. From drumming on trees to carving out homes, these master carpenters are thriving in the most unlikely of places. But why are they drawn to the bustling streets and towering buildings?

Not long ago, energy analysts noticed something weird in the data they were tracking. The abnormality was coming from Pakistan. All of a sudden, the country seemed to be using far, far less electricity than before. What the analysts would discover baffled them – it was a different kind of…

Thousands of ships loaded with oil were sunk during the fierce sea battles of the Second World War. That means they’ve been sitting underwater for eight decades, with no maintenance or protection. Scientists fear many of these wrecks are now close to collapse — and that a spike in catastrophic…