A new way of defining temperature?
Atoms wriggle – they can’t help themselves. And the warmer they are, the faster they writhe. By using lasers to measure how fast atoms of the element caesium zip around a vacuum chamber, Australian scientists have shown they can calculate the sample’s temperature. The super-accurate technique could be adopted as the basis of a new definition for the standard unit of temperature, the Kelvin.
Invisibility becomes reality?
As far back as Plato people imagined the power of invisibility. Now the fantasy is being made real.
What does an electron cloud really look like?
A new microscopy technique allows us to see the glue that holds molecules together.
Ghost traps: the hunt for dark matter
We have no idea what most of the matter in the Universe is made of. Are we finally closing in on dark matter?
Why the building blocks in our cells turned to the left
Amino acids could have become “left-handed” on a journey through space. Viviane Richter explains.
Ancient forest microbes live 2.5 kilometres under the sea
Scientists drilling off the coast of Japan have awoken an ancient creature from its long slumber. But don’t worry – they did not find Godzilla. They revived a community of microbes, trapped beneath the ground for around 20 million years.
Measuring the sixth mass extinction
How can we trust recent claims Earth is on the brink of a sixth mass extinction, when we can’t say with certainty how many species our planet has?
The lymphatic drain inside your brain
Has the human brain been hiding a dirty secret? While studying the membranes around a mouse brain, neuroscientist Antoine Louveau stumbled across something that wasn’t supposed to be there: a web of drainage channels called lymphatic vessels, the body’s waste disposal system.