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Cyclones Trevor and Veronica hit north Australia in 2019. NASA Earth Observatory handout/EPA/AAP

I’ve always wondered: how do cyclones get their names?

In 1887 Queensland’s chief weatherman Clement Wragge began naming tropical cyclones, using names from the Greek alphabet, fabulous beasts and politicians who annoyed him.
Pluto in enhanced color, to illustrate differences in the composition and texture of its surface. NASA / Johns Hopkins University Applied Physics Laboratory / Southwest Research Institute

I’ve Always Wondered: How do we know what lies at the heart of Pluto?

Pluto has a density between that of rock and ice – so that immediately suggests the dwarf planet is made of a mix of both. But how do we know?

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