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Feedback: The President of Nigeria is (almost certainly) not a clone

12 December 2018

Strange – and not at all suspicious – denials from Muhammadu Buhari. Plus: the legal quest for eternal youth, dogs as ideal bedfellows, equine inequality and more

Dan Holdsworth captures a vanishing landscape in a point-cloud

12 December 2018

Armed with drones, helicopters and military-grade software, a British photographer has developed a new way to remember glaciers

Life size

12 December 2018

I have an oak tree in a pot grown from a seedling. After three years it is healthy but barely a metre tall. However, its leaves are much the same size as those of a mature oak. In animals, a stricter law of proportion seems to apply: babies have tiny...

Flight of fantasy

12 December 2018

Earlier this year, a flat-Earther launched a ballistic rocket to observe Earth from altitude. If it were indeed flat and shaped like a frisbee, what would his ballistic path look like if he launched near the disc edge and aimed towards the edge? Would...

Wine breathing

12 December 2018

Sometimes I open a room-temperature bottle of red wine and put in a valved spout. On operating the valve the next day, at the same temperature, the noise I hear suggests that the air in the bottle was at a lower pressure than that outside. Why should...