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The 20th-century Austrian-British philosopher Karl Popper believed that any theory that was not ‘falsifiable’ – capable of being tested and proven incorrect – should be dismissed as unscientific. He was particularly critical of Marxist theory, which he believed was constantly being revised by its adherents to account for its failed predictions, and therefore could not possibly be scientific. The falsification principle is a cornerstone of the modern scientific method, but some contemporary scientists, cosmologists and philosophers believe it might need to be revised as they investigate concepts such as string theory and the multiverse, which come up against the limits of what is testable – at least for now.
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Computing and artificial intelligence
A scientist’s poor eyesight helped fuel a revolution in computer ‘vision’
9 minutes
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Thinkers and theories
Henri Bergson on why the existence of things precedes their possibility
3 minutes
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Ageing and death
Demystifying death – a palliative care specialist’s practical guide to life’s end
4 minutes
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Future of technology
Is this the future of space travel? Take a luxury ‘cruise’ across the solar system
6 minutes
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Metaphysics
Why mathematical truths exist with or without minds to consider them
8 minutes
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Computing and artificial intelligence
Struggling to learn how to do a backflip, Nikita takes on an unusual training regimen
12 minutes
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Deep time
When algae met fungi – the hidden story of life’s most successful partnership
4 minutes
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Ecology and environmental sciences
From helicopter flybys to trail cameras, there’s no one way to count a wolf
8 minutes
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Biology
Explore a bioluminescent world of cellular life via cutting-edge microscopy
27 minutes