The amazing stability of bicycles

A bicycle is a good example of something that is commonplace and yet quite extraordinary. It seems such an unlikely mode of transportation. One has to wonder how someone came up with the bizarre idea that by sitting astride a bar that connects two wheels one behind the other, one could propel oneself forward without falling. And yet everyone who has ridden a bike knows that it feels remarkably stable and as long as it is moving, it stays upright and seems to almost ride itself. ‘Look, no hands’ is the common exultation expressed by new learners as they discover for themselves that the bike can be ridden with minimal action on their part other than to keep it moving. [Read more…]

NASA ban on Chinese scientists lifted

In a startling display of good sense, the ban on Chinese scientists attending a conference on the Kepler space telescope program at a NASA site has been reversed, after many non-Chinese scientists started talking about boycotting the event altogether, since even Chinese graduate students and post docs working in the US with US scientists would be barred. [Read more…]

Why snake handlers don’t get bitten as much as might be expected

The practice of snake handling as a test of faith is popular in certain rural Pentecostal churches in the US. There is even a TV series called Snake Salvation about this practice on the National Geographic channel. It is highly dangerous to handle poisonous snakes and this has resulted in some of the people being fatally bitten. [Read more…]