Ancient Toolmaking Roused Humanity’s Need for Language
A couple of million years ago our ancient human ancestors created the world’s first tools when they broke some rocks into sharp shards so that they could slice apart and butcher game such as gazelles or zebras. These early implements, called Oldowan tools, are the world’s oldest-known cutting devices. The term “Oldowan” is taken from […]
Rhythmic Light Pulses Help Astronomers Accurately Measure Medium Sized Black Hole
Astronomers have calculated that there may be about 100 million black holes in the galaxy. And they mostly fall into two sizes… stellar and supermassive. The size difference has to do with how much mass they contain versus that of our own sun or solar mass. For some time now, astronomers have also theorized that […]