Carbon dating live penguin
Even the most sleep-deprived human has nothing on a Mexican cavefish.
A newly designed device routes photons along twisting paths with minimal scattering by exploiting ‘topological’ effects.
In physics, topological properties are those that do not change when a shape is deformed; as such, they can preserve the direction of electrical currents and protect light waves from disturbances.
Thanks to this split, single photons emitted by a light source in the slab could travel only along the boundary between the sections.
The device’s design also prevented the light from scattering when it swerved around bends and forced polarized light to travel in only one direction.
To explore the medical potential of that diversity, Sean Brady at the Rockefeller University in New York City and his colleagues analysed roughly 2,000 soil samples collected across the United States.
The finding suggests that high levels of HCRT help to keep them awake.
Such devices typically require a highly stable laboratory environment.Gerald Mayr at Senckenberg Research Institute and Natural History Museum Frankfurt in Germany and his colleagues analysed the fossilized remains of a giant extinct penguin (Kumimanu biceae) discovered in the Moeraki Formation in Otago, New Zealand.The team estimates that the bird was 1.77 metres tall and weighed more than 100 kilograms, making it one of the largest penguins ever to have lived.In the meantime, to ensure continued support, we are displaying the site without styles and Java Script.An enormous species of penguin that stood as tall as a human roamed the waters of New Zealand some 60 million years ago, shortly after its first flightless predecessors appeared.With improvements, the clock could be used to measure land heights with an accuracy of 10 centimetres, making it useful in remote settings where conventional surveys are difficult, the authors say.