Waterfalls are big steps on fluvial channels, due to difference land altitude. In this planet there are several amazing waterfalls…
How can web determinate the soil permeability? In this excerpt from the "Principle of Soil mechanics course", Ian Smith gives…
Seismic tomography is a technique for imaging the subsurface of the Earth based on seismic waves produced by earthquakes or seismic…
When we talk about climate change, sometimes referred to as global warming although it is not the same, we are…
A common question regarding climate change is “what can we do to help, in whatever way”. Environmental awareness is a…
Everyone has heard about acid rain but few know exactly what it is and what causes it. Acid rain is any…
Skyscrapers have been getting taller and taller through the years. When New York City's Empire State Building was built in…