Chemical weathering involves the change in the composition of rocks, often leading to a 'break down' in its form. This is done through a combination of water and various chemicals to create an acid which directly breaks down the material.
Zimbabwe is often reported to have the highest adult literacy rate on the continent. A recent news article claimed that 90% of the population is literate. The data does not back up the claims. Researched by Kate Wilkinson.
Matthew Rioux, a researcher at MIT, analyzed pieces of ocean crust from the East Pacific Rise, a mid-ocean ridge 1,200 miles (1,900 kilometers) off the west coast of South America that is one of the fastest-spreading ridges in the world.