D-day’s heroes didn’t all wield rifles. On the 80th anniversary of the Normandy landings, wetland scientist Christian Dunn explores the fascinating, yet largely unknown story of the covert mission that secured the beaches, not with bullets but with soil samples. Discover how the science of mud became an allied secret weapon on the shores of Normandy.

Is space exploration a distraction from Earth’s problems? A growing movement says that it is, with concerns about billionaires, space junk and a disconnect from our own planet. But is there a way to explore space responsibly, while still tackling climate change and respecting indigenous cultures?

Meanwhile, back on Earth, a selection of archaeological enigmas continue to puzzle historians. From intricately carved Neolithic stone balls to miniature Roman artefacts of unknown purpose, these objects offer tantalising glimpses into a bygone era.

If you enjoy The Conversation’s attempts to uncover forgotten storries and unravel ancient mysteries, please consider making a donation. We’re a charity and anything you can give will help us continue to share academic knowledge.

Siriol Griffiths

Wales Editor

British Troops coming ashore at Gold Beach on D-Day in 1944. CBW/Alamy

D-day’s secret weapon: how wetland science stopped the Normandy landings from getting bogged down

Christian Dunn, Bangor University

Scientists with expertise in mud and peat were a key part of planning the Normandy landings in 1944.

Elon Musk celebrates as SpaceX Crew Dragon Demo2 manned space mission launches from Kennedy Space Center in 2020. ERIK S. LESSER/EPA

Welcome to the age of space scepticism – and a growing revolt against elites

Tony Milligan, King's College London

Billionaires such as Elon Musk and Jeff Bezos are among those most vocal about the benefits of exploring, mining and colonising space.

Two dodecahedra and an icosahedron on display in the Rheinisches Landesmuseum Bonn, Germany. Kleon3/Wiki Commons

Five mysterious ancient artefacts that still puzzle archaeologists

Natasha Harlow, University of Nottingham

From neolithic stone balls to Roman cosmetic grinders, here are five finds that have baffled archaeologists.

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