资讯

Primarily, the compass was used for geomancy for a long time before it was used for navigation Ancient Chinese alchemists realized that the magnetite ore would point towards a magnetic north. Their ...
The cores contained sediments from ancient coastal wetlands that formed and drowned as the present-day North Sea flooded in, leaving behind thin (10–30 centimetres) layers of decayed organic ...
a community of sea sponges has survived for centuries by eating the fossils of ancient extinct worms. Researchers discovered the underwater mountain in 2011, while mapping uncharted Arctic waters ...