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One technique involves releasing particles of sulphur dioxide high up in the stratosphere. Another involves trying to brighten the clouds over the sea by spraying salt water off the back of ships. Both are potential methods of solar radiation modification (SRM), a type of solar geoengineering aimed at trying to…

Like many people, I first encountered drones when they looked like toys, something fun to play with and be entertained by. Not long afterwards I was waiting for a boat on my commute to work, and a drone hovered overhead, not far above me, and with no sign of an…

Freshwater ecosystems are impacted by human activities, including climate change, pollution and invasive species.

Steve Biko was undoubtedly the most influential South African liberation struggle theorist and activist of the 1970s. Rick Turner was arguably among the most effectual white anti-apartheid activists of the era. Biko espoused black consciousness while Turner was a Marxist philosopher. Biko (30) was murdered by apartheid police in 1977.…

The cheering, clapping and speechifying are over. Historians from the Smithsonian’s National Museum of American History have returned after their trips to the 2024 political party conventions to collect materials – from balloons to banners to blinking wristbands – at each of them. For the last in a series of…

With global temperature records broken for months on end, and the severity of extreme weather events routinely attributed to climate change, you might think any technological developments with the potential to stop global warming would be welcomed the world over.

Without context, vast numbers are meaningless. Data can be incredibly dry, abstract and difficult to visualise. But sometimes scientists find clever ways of presenting complex information in creative, eye-catching and more tangible forms.

Just three weeks ago, Reserve Bank Governor Michele Bullock declared interest rate cuts unlikely in the next six months. But if there was any doubt about what’s going to happen to global interest rates, the US Federal Reserve chair Jerome Powell removed it on Saturday.

The Conversation Africa condemns the harassment of its West Africa editor, Adejuwon Soyinka, by Nigeria’s Department of State Security operatives.

Supermassive black holes have masses of more than a million suns – but their growth has slowed as the universe aged

The passage of time can slow to a crawl when you're waiting, and waiting, and waiting. How will the Boeing Starliner astronauts feel time move if they have to stay in space for another 6 months?