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Modern commercial aircraft flying at high altitudes create longer-lived planet-warming contrails than older aircraft, a new study has found. The result means that although modern planes emit less carbon than older aircraft, they may be contributing more to climate change through contrails. Led by scientists at Imperial College London, the study highlights the immense challenges the aviation industry faces to reduce its impact on the climate.

Signals captured on underwater microphones could be key to locating airplanes such as MH370 when they crash into the ocean, Cardiff University research shows. More than 100 hours of data, captured by devices known as hydrophones after 10 historical aircraft accidents and one submarine disappearance, were analysed for the study.

Equipping self-driving cars with external displays which use coloured lights to communicate their next manoeuvre could help keep cyclists safe on the roads of the future, researchers say. With autonomous vehicles becoming more common, reducing active human involvement in driving in the process, researchers from the University of Glasgow have been working to investigate new ways to help self-driving cars speak the language of cyclists.

Dr Daniel Oviedo Hernandez (UCL Bartlett Development Planning Unit) argues that walking in African cities shouldn't be a miserable experience and urges city planners to design ways to make walking easier in collaboration with citizens in The Conversation. African cities aren't welcoming places for pedestrians.