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Caleb Scharf

Caleb Scharf

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Caleb Scharf is Director of Astrobiology at Columbia University. His next book, The Copernicus Complex, will be published in September 2014.

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  3. soldier training John Moore/Getty Images
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    What’s the Endgame in Ukraine?

    Nearly three months after Russia launched its invasion, Western countries appear more committed than ever to Ukraine’s defense, and, in some quarters, to Russia’s defeat. We asked PS commentators what outcome the West, Russia, and Ukrainians themselves can realistically expect.

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  7. strain1_ STEFANI REYNOLDSAFP via Getty Images_empty restaurant economic slowdown STEFANI REYNOLDS/AFP via Getty Images

    Will US Inflation Lead to Recession?

    Michael R. Strain

    While some economic indicators suggest that the recovery remains on track, others show that consumers may be stalling out, and that households and businesses are becoming increasingly pessimistic. The US Federal Reserve will have to respond more nimbly to economic softening than it did to strengthening in 2021.

     urges the Federal Reserve to keep its options open as it tries to restore price stability.
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