Retina
Birds keep sharp vision running on glucose alone
Birds maintain sharp vision with a retina that receives almost no oxygen. Danish researchers have now shown how this is possible: a specialised eye structure supplies glucose and removes...
Leaf relic
Under the microscope it looks just like a freshly picked leaf: the stomata on this fossil found in Brunei are still razor-sharp. Yet this leaf is at least two...
One cubic millimetre of brain
84,000 neurons, 523 million synapses and 4 kilometres of axons. All of this is hidden within 1 cubic millimetre of mouse brain, as revealed...
The glowing orange crab
Fluorescence is not only widespread among reef fish and cnidarians – Cryptochiridae crabs also frequently emit an orange glow (see photo). This was discovered...
Glowing palette expanded
Japanese biotechnologists have succeeded in expressing twenty different colours of bioluminescent proteins, compared with the five colours that were previously possible. This advance was...