Bridges, viaducts, dams: they're all large structures that have to be constantly monitored for cracks, deformations and shifts that could affect the way they're used, or potentially cause disasters.

Have you ever looked at a picture and felt like something was “off” but couldn’t quite put your finger on it? That’s the fun (and frustration) of optical illusions. They test not only our eyes but ...

EVERYONE can see the colourful houses – but only those with a genius IQ and 20/20 vision can spot the one with a crack in under 60 seconds. The property hiding among a row of perfect condition homes ...