Curious Kids: How much does a cloud weigh?

Khakimullin Aleksandr/Shutterstock How much do clouds weigh? – Torben, aged 10, London, UK We see clouds often: fluffy clouds on a nice summer’s day, towering thunderstorms, wispy high clouds or even grey clouds that cover the whole sky for days. Clouds seem to be floating in the air, which mightContinue Reading

Bacteria and viruses are travelling the world on highways in the sky

Jag_cz/Shuttestock Microbes are the truly dominant group of lifeforms. These invisible pieces of biogenic matter have been running Earth’s affairs for billions of years. Plants and animals popped up as the by-products of microbial mergers relatively recently in our planet’s history. Understanding microbes is not easy. It took us someContinue Reading

Are the Earth's magnetic poles about to swap places? Strange anomaly gives reassuring clue

St Helena, where Earth's magnetic field behaves strangely. Umomos/Shutterstock Deep inside the Earth, liquid iron is flowing and generating the Earth’s magnetic field, which protects our atmosphere and satellites against harmful radiation from the Sun. This field changes over time, and also behaves differently in different parts of the world.Continue Reading

Coronavirus: how the pandemic has exposed AI’s limitations

AI has its limitations in a crisis. Shutterstock It should have been artificial intelligence’s moment in the sun. With billions of dollars of investment in recent years, AI has been touted as a solution to every conceivable problem. So when the COVID-19 pandemic arrived, a multitude of AI models wereContinue Reading