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Illustration of a comet from an old manuscript on the left, and a black and white image of a comet in space on the right.

The Past

Asteroid anxiety: Astronomy’s 300-year quest to predict cosmic collisions

Fears of celestial collisions — and calculations of their likelihood — go back to the very origins of modern science itself.

Thomas Moynihan

Spectators observing a dramatic eruption from active volcanoes at twilight.

There are more active volcanoes than you think

Volcanologists warn that magma-filled vents evolve over time, leading to an underestimation of the number that might erupt — especially those capable of the biggest explosions

Luca Caricchi & Guido Giordano

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