How did our timekeeping system come about?

02:13

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Our viewer's question this week comes from Arnulfo Quintanilla from El Salvador.

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More on Science from around the world

Waterbeds that cool cows and heat houses

Cows provide heat, influencers explain science and cyberattacks threaten clinics.

Why do we sometimes see the Moon during the day?

We associate our lunar companion with nighttime. But it's also often visible during the day. Here's how it all works.

Mysterious comet visits our Solar System — Tomorrow Today

What makes comet 3I/Atlas so special? Also: How can we get climate change under control?

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DW's Top Story

Ukraine: Wadephul hails Geneva talks as European success

Germany's top diplomat says the talks on a peace plan for Ukraine have made the EU's stance clearer. DW has more.

In Geneva, Ukraine, US signal optimism for peace plan

DW interview with German Chancellor Friedrich Merz

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More stories from DW

Africa

Nigeria: More young people suffer from diabetes

Nigeria: More young people suffer from diabetes

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Asia

India's drought robs girls of their chance at an education

India's drought robs girls of their chance at an education

Germany

German village struggles to unite amid migration challenge

German village struggles to unite amid migration challenge

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Europe

Luxury to fast fashion: How green European brands really are

Luxury to fast fashion: How green European brands really are

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Middle East

Israel-Hezbollah ceasefire tensions threaten to escalate

Israel-Hezbollah ceasefire tensions threaten to escalate

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Latin America

Brazil's ex-president Bolsonaro taken into custody

Brazil's ex-president Bolsonaro taken into custody

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