Nicaragua and Panama borders Costa Rica
Answer by Mimiwhatsup: These 'rocks' are actually called fossils they are originally called sedimentary rocks as they are the only rocks that can undergo the certain process. Besides fossils regular rocks can be used to show how long they have been around there are these machines that show how long something has been around and what happened to it.
China believes that building the Three Gorges Dam was an absolute necessity in terms of energy production because it can generate hydro-electric energy from Yangtze River. This hydro-electric-producing dam would generate less pollution than coal-fire generation and would slow the river from overflowing and destroying nearby villages.
