OPINION - Tech & Science Daily podcast: Mars circle sand dunes mystery

HiRISE camera image of almost perfectly circular Mars sand dunes (NASA/JPL-Caltech/UArizona)
HiRISE camera image of almost perfectly circular Mars sand dunes (NASA/JPL-Caltech/UArizona)

Nevermind earthly crop circles, space scientists are scratching their heads over the discovery of near-perfectly round sand dunes on the surface of Mars.

They were revealed by the University of Arizona’s High-Resolution Imaging Experiment camera flying 185 miles overhead on Nasa’s Mars Reconnaissance Orbiter, with the images suggesting these strange dunes were blown south by unpredictable Martian winds.

The HiRise project is primarily examining how frost on the Red Planet disappears in late winter, and the circular dunes appear free from frost.

Following a study called Protect Earth’s Orbit, scientists are calling for a global treaty to help prevent space pollution, and its risk to Earth’s seas and land.

Tech & Science Daily podcast interviews the University of Plymouth’s Dr Imogen Napper, study lead author and an ocean plastics pollution expert, about the risks from 60,000 satellites expected to orbit earth by 2030.

There’s also a look at the speed of London’s new 5G network for the Underground, which has started service on three lines

We speak with Ken Ranger, chief operating officer at BAI Communications, which is fitting cabling and transmitter infrastructure for TfL.

Plus, dinosaur growth secrets revealed, link between 15 fifteen fewer minutes on social media and better health, driverless car worries, e-scooter rider loses pothole injury claim and world record premature twins.

Listen above, and find us on your Spotify Daily Drive or wherever you stream your podcasts.