Science & TechnologyWhy does the sky turn red at sunset?
Sunlight, the atmosphere and a longer journey: the science behind the colours of sunset.
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Science & Technology
Stories, explanations and fresh perspectives that make the everyday worth a second look.
Science & Technology
Science & TechnologyLeap years: why does February get an extra day?
The four-year rule has exceptions. Discover how the calendar tries to keep pace with Earth’s movement.
Science & TechnologyWhy does the Moon change shape during the month?
The Moon does not disappear or change size with each phase. What changes is the illuminated portion we can observe.
Science & TechnologySeasons: why does summer not happen everywhere at once?
Earth’s tilt helps explain changing day lengths and the opposite seasons experienced in the two hemispheres.
Science & TechnologyWhat are clouds made of, and why do their shapes differ?
Clouds contain tiny water droplets, ice crystals or both. Their appearance tells part of the atmosphere’s story.
Science & TechnologyWhy do droplets appear on the outside of a cold drink?
Water outside a glass can come from the air. Temperature, water vapour and condensation explain this everyday transformation.