In the up and down world of software reliability it was a case of both up and down yesterday for London's Tower Bridge, which seized with its roadways in the elevated position for ten hours after software control systems went down. Sneak was initially surprised to learn that 2,000 tons of Victorian ironmongery needed any software to swing open and shut - surely a really big lever ought to be sufficient - but apparently it's impossible to crack an egg these days without a laser-guided scalpel. So kudos to Rockwell Automation and Fairfield Control Systems for bringing a landmark piece of 19th Century engineering into the 21st Century world of unrecoverable system errors.
Some parts of Atacama have not received rainfall for 500 years - but a sudden deluge of water upset the Desert's delicate biological balance
Spitzer Space Telescope could not spot Oumuamua, suggesting that it is actually pretty small
Greenland crater one of the 25 largest impact craters on Earth
This long-sought progenitor star was identified in an image captured by Hubble in 2007