| Published: February 15, 2013 – 4:00 pm
My O my, wow… the 7,000-ton meteor over the Chelyabinsk region slammed into our atmosphere at 15,000 km per hour (33,000 miles an hour). Witnesses could see the flash of light 500 kilometers away. It was probably 15-meters (50 feet) across. When these things hit the atmosphere they just blow up. It’s not combustion, at Read More >
| Published: May 30, 2012 – 10:08 am
On the Bill Nye the Science Guy® show, I often added a segment that was part of that episode’s topic that I felt was important and just plain interesting. I called them “Consider The Following.” Recently, we made several more. They’re not part of a show, they’re for you, right now, here on the internet. Read More >
| Published: February 2, 2012 – 10:06 am
Audacious— that’s how I describe the Arecibo Ionospheric Observatory radio telescope. For me, it was just hard to believe what I was seeing. I just returned from my first Planetary Society-sponsored trip to Puerto Rico and this historic, remarkable, big idea of a machine. If you’re not familiar with this observatory, it was featured Read More >
| Published: November 14, 2011 – 9:31 pm
O my friends, I have received numerous messages asking about the voice-over I did for the Climate Reality Project. My voice describes an experiment or demonstration that I’ve performed several times over the last 15 years. You can put pure carbon dioxide in a vessel, illuminate it with a bright hot lamp, and its temperature Read More >
| Published: August 10, 2011 – 4:35 pm
My father wore a beautiful gold wristwatch. It was how a young traveling salesman made sure he was on time for his appointments. To energize the movement, he had to wind it everyday. This was before we could all carry mobile phones accurate to milliseconds. Timekeeping was a bit of a fascination for my dad. Read More >
