We might think that we understand how birds communicate, hunt, and navigate the world, but really, we are filling in the gaps ...

Earth's oceans may have been green for billions of years until the first photosynthetic organisms flooded our atmosphere with ...

Some cyanobacteria have pigments that specialise in harvesting green light to power their photosynthesis, which may be an evolutionary adaptation to a time when the oceans were iron-rich and green-tin ...

KEY POINTS A 77-year-old man presented to the emergency department with a 4-day history of progressive weakness resulting in recurrent sudden falls at home. He also described fever and cough, ...