A Stitch in Time

A Stitch in Time

If you are trying to build a time machine, don't bother: even if we can design them, the universe makes it impossible for us (or anyone) to build them.

Up, Up and Away...

Up, Up and Away...

Balloon science is an often-neglected older cousin of rocket science and NASA's primary goal with this launch is to test a better balloon

Your Mileage May Vary

Your Mileage May Vary

Auckland's 2017 Bike Challenge winds up today; February may be the shortest month, but it is prime cycling season in Auckland, with decent weather and long evenings.

New York State of Mind

New York State of Mind

One of the commonest questions about the Big Bang is "If the universe is expanding, is everything in it getting bigger? The solar system, the sun, the earth, our bodies and the atoms we are made of?"