The changes in ocean chemistry were gradual. The Archaean period lasted 1.5 billion years. This is more than half of Earth’s ...

Nearly three fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space. But Japanese researchers have made a ...

Hillstream fish thrive in the fast-flowing, oxygen-rich, cool waters of our eastern hill tracts — represent a stunning diversity of life. Yet, these freshwater wonders remain largely in the shadows in ...