Limestone is a sedimentary rock that primarily comes from remains of marine organisms, such as shells or corals. These organisms have a skeleton or shell...
The city of Knossos on the island of Crete had a rather warm climate with dry summers and mild but sometimes very humid winters. With...
Dry sand is made up of grains that don’t hold together too well, but when it’s slightly damp, a small amount of water forms liquid...
To find their native beach each time they return to lay eggs, sea turtles primarily use the Earth's magnetic field, which serves as a true...
Very hot lava starts with a white or bright yellow color, as its temperature often exceeds 1000 to 1200°C. At these high temperatures, the molten...
Colored crystals form through the slow solidification of minerals present in certain rocks. As they cool or under the effect of pressure, these minerals gradually...
A caldera is simply a huge basin formed by the sudden collapse of the summit of a volcano when the magma chamber empties after a...
Underground, hot rocks from the magma continuously heat the water present in underground cavities. This water gradually heats up but does not boil immediately due...
Some rocks are hard and resilient, like granite: they create sharp, steep, or pointed peaks. Other rocks, softer like limestone, wear down quickly or slightly...
When you pass a magnet over the sand on a beach, you can sometimes see some black grains sticking to it: these grains have a...
