Samir Ahmed

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Elon Musk's next big project could be supersonic jet

Elon Musk, the billionaire behind PayPal and SpaceX, has suggested that his next big project could be a supersonic vertical take-off passenger jet.<p>The entrepreneur, who also co-founded electric car company Tesla Motors, expressed frustration that Concorde was decommissioned in 2003 without any …

Tesla

Time to look for Mira the Wonderful, a famous variable star

It’s time to look for the star known as Mira the Wonderful. It’s a famous variable star in the constellation Cetus the Whale.<p>More often than not, you …

Astronomy

A new way of thinking about how the brain works

Modern neuroscience is based on the discovery of the neuron, but this is only half the story<p>My book, <i>50 Human Brain Ideas You Really Need to Know</i>, is out now, and is available at a discount price from Amazon and the <i>Guardian</i> bookshop. (And here's a lovely review by Vaughan Bell, who calls it "a …

Stem cells: what happened to the radical breakthroughs?

Much was promised in the late 1990s, but the challenge of advances such as growing whole human organs has been difficult to deliver<p>It's 1998 and science is taking big strides. The first cloned mammal, Dolly the Sheep, has just had her first lamb; the first robotically assisted heart surgery has …