Robin McKie reflects on his 40 years as science editor for the Observer and tells Madeleine Finlay about the game-changing discoveries and scientific controversies that he’s reported on during that time. He describes how the discovery of the structure of DNA revolutionised science, what he learned about misinformation from the HIV/AIDS pandemic and why cold fusion and the millennium bug failed to live up to their hype.

What I’ve learned after 40 years as the Observer’s science editor

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Jeff Bezos’s Blue Origin rocket blasts off on Monday, with his fiancee, Katy Perry and three others on board. But is it more than just a stunt?

Jeff Bezos is blasting his bride-to-be Lauren Sánchez and her “guests” to space on Monday – a plan that might, under other circumstances, contain mixed messages.

A crew of six women – Amanda Nguyen, a civil rights activist who will become the first Vietnamese woman to fly to space; the CBS Mornings co-host Gayle King; the pop star Katy Perry; film producer Kerianne Flynn; entrepreneur and former Nasa rocket scientist Aisha Bowe; and Sánchez, a journalist and philanthropist – will blast off on Blue Origin’s New Shepard rocket from the company’s launch site, 30 miles north of Van Horn, Texas, on an 11-minute, suborbital flight to the edge of space and back.

Almost as amazing as the knowledge we have gained in the past four decades is the fact that some people continue to deny the damage we are doing to our world

Earlier this year I received an email from a reader asking background questions about an article I had written more than four decades ago. Given the time gap, my recollection was hazy. To be honest, it was almost non-existent. So I was intrigued – and then astonished when I read the feature.

I had written about the British glaciologist John Mercer, author of a 1978 Nature paper in which he warned that continuing increases in fossil fuel consumption would cause amounts of atmospheric carbon dioxide to soar. Global temperatures could rise by 2C by the mid-21st century, causing major ice loss at the poles and threatening a 5-metre rise in sea levels, he warned.