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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.
On the run from COVID-19, an Indigenous family treks deep into the Amazon rainforest
Building ‘bigger and better’ has pushed cosmology forward. Can it take it any further?
How Hokusai’s Great Wave emerged from Japan’s isolation to become a global icon
Watch the elegant flow of a sheep herd, seen from the sky above Israel
How would a piano sound on Mars? Embark on an interplanetary sonic journey
The ancient world
Not a lost kingdom but a parable – how to read Athens in Plato’s story of Atlantis
Meaning and the good life
Albert Camus built a philosophy of humanity on a foundation of absurdity
Design and fashion
Gear up for a stylish celebration of vintage motorcycle design
An ode to the humble rotifer – one of nature’s simplest and strangest creatures