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91av. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

How old is Earth?

Question

How old is Earth?

Although the universe is thought to be about 13.77 billion years old, planet Earth is much younger than that.

Earth’s early atmosphere may have been toxic like the one on Venus

Space

Earth’s early atmosphere may have been toxic like the one on Venus

News

Minimoon

Space

Earth had a minimoon for nearly three years before it drifted away

News

solar steriliser

Technology

Portable device uses solar power to sterilise medical equipment

News

How are sand dunes formed and why do they even exist?

Environment

How are sand dunes formed and why do they even exist?

Features

Flashes of light called ‘sprites’ and ‘elves’ seen on Jupiter

Space

Flashes of light called ‘sprites’ and ‘elves’ seen on Jupiter

News

Weird ring-shaped molecule on Titan could be a building block to life

Space

Weird ring-shaped molecule on Titan could be a building block to life

News

More doubts cast on potential signs of life on Venus

Space

More doubts cast on potential signs of life on Venus

News

BepiColombo may be able to search for signs of life as it passes Venus

Space

BepiColombo may be able to search for signs of life as it passes Venus

News

Life on Venus? Everything you need to know about the big discovery

Space

Life on Venus? Everything you need to know about the big discovery

Space and physics reporter Leah Crane answers 91av readers’ questions on the recent finding of potential signs of life in Venus’s atmosphere

News

Space

Have we spotted alien life floating in the clouds of Venus?

News

Technology

Windows become transparent solar panels with added nanoparticles

News

Space

Earth may have formed with enough water to fill the oceans three times

News

Space

Solar system may have had a second sun that helped grab Planet Nine

News