New metric for designing safer streets

A new study shows how biometric data can be used to find potentially challenging and dangerous areas of urban infrastructure. By analyzing eye-tracking data from cyclists navigating Philadelphia’s streets, researchers found that these individual-based …

At last: Separated and freshly bound

The carbon-hydrogen bonds in alkanes — particularly those at the ends of the molecules, where each carbon has three hydrogen atoms bound to it — are very hard to ‘crack’ if you want to replace the hydrogen atoms with other atoms. Methane (CH(4)) and …