Life
Should you water your orchid with ice cubes?
There's a fierce debate raging in the horticulture world over whether adding ice cubes to your orchid is beneficial or damaging for this tropical plant. James Wong investigates
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How long would it take to accelerate to 99 per cent light speed?
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Is it known when humans or our ancestors first started to sing?
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This week鈥檚 new questions
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Is there such a thing as a ‘vegetative electron microscope’? Doubtful
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Twisteddoodles has cracked it!
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Tom Gauld on the science of Easter
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Life
Images capture the timeless beauty of America’s ancient forests
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Mathematics
This versatile piece of maths can help you solve all kinds of problems
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Why do many animals have white undersides?
Readers explain that this colouration pattern in many living things is all about camouflage, while its opposite tends to signal a creature with robust defences
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Why do plastic clothes pegs fade and get brittle in the sun?
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Is it more efficient to cart water in a bottle or my stomach? Part 2
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This week鈥檚 new questions
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Comment
It’s good to have a word describing why going viral is now meaningless
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