Traces of the Ancient Seas
Since ancient times, the remains of various marine animals — primarily clamshells — have been found on land, including far from the ocean and high up in the mountains. Ancient people puzzled over how they got there, but now we know the answer and can even use these traces of ancient seas in order to learn about our planet’s past.
Why Every City Has Its Own Climate?
Most of the people on Earth currently live in cities, but many of them don’t realize that the urban climate they experience is different than outside the city. Why does this happen, and what consequences can it have for city populations?