Topic : "Cent"

In the first century the Romans were preparing lime as calcium oxide but they did not recognize it as a metal.

A recent study by climate change experts suggests that a 3 °C rise in world temperatures by the year 2010 would destroy around 75% of the Amazon.

In recent times the number of climbers attempting to reach the summit of Mt Everest has increased dramatically, causing concerns for both safety and the state of the mountain as climbers routinely leave litter, gear and other debris behind.

Lenticular galaxies (S0 symbol) have a bright central bulge with a disk-like structure but, unlike spiral galaxies, the disks have no spiral structure and are not actively forming many stars.