The Permanent, Unmistakable Mark Human Beings Have Left on Planet Earth

Have we entered a new geologic era, the Anthropocene? Or put differently: hundreds of thousands of years from now, when future geologists sift the earth for clues about our present day, what lasting evidence of our existence will they find? Scientific American presents a rather fascinating article about how we are fundamentally making our mark on the planet. (Spoiler: it involves concrete, plastic, and radioactive isotopes … Continue reading The Permanent, Unmistakable Mark Human Beings Have Left on Planet Earth

PBS LearningMedia

I just came across PBS LearningMedia, a very cool website partnership between PBS and WGBH Boston. They’re taking free PBS media content and adding a great discovery and filtering layer on the web that allows educators (or anyone, for that matter) to find compelling assets to compliment or supplement academic learning. The dorky side of me gets excited about this because I like PBS and I love learning. … Continue reading PBS LearningMedia

Time flies, but what is it anyway?

As the end of 2014 approaches, so many of us wonder where the year behind went. Time, as they say, flies by. But ever stop to wonder, “what is time?” Is it a physical dimension like distance? How is this “4th” dimension different? Why don’t the laws of physics care which direction time runs? An episode of the very excellent BBC Discovery podcast explores many of these issues. It’s … Continue reading Time flies, but what is it anyway?