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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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Biology
The key to geckos’ unrivalled climbing skills isn’t sticky feet. It’s subatomic
4 minutes
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Technology and the self
Greetings from Green Bank – the small town where modern technology is banned
10 minutes
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Stories and literature
What makes John Keats’s ‘Ode on a Grecian Urn’ so enduringly powerful?
10 minutes
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Human evolution
Far from frivolous, cuteness is a powerful – and still mysterious – force of nature
6 minutes
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Philosophy of mind
Do we have good reasons to believe in beliefs? A radical philosophy of mind says no
5 minutes
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Space exploration
In the search for life, might alien ocean worlds be a better bet than Earth-like planets?
5 minutes
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Philosophy of religion
How a devout Catholic philosopher approaches the problem of evil
8 minutes
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Love and friendship
When drawing your muse hundreds of times becomes an exercise in love
7 minutes
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Thinkers and theories
Is simulation theory a way to shirk responsibility for the world we’ve created?
13 minutes