How can life keeps flowing?

How could traders from the landlocked city-states gain access to the sea? How many species on the Great Barrier Reef? How can animal survive in deep ocean with high pressure? If heat isn't the major feature of a desert what is? What did taj mahal look before built? What is the name of the second biggest pyramid in eyjept? What did the Mackenzie and Yukon river basin clothing? When was Yellowstone park discovered? How much does Stonehenge weigh? What eats the river bulrush? When was the Burj Khalifa commissioned? What is a famous geograghic feature in Pennsylvania? What was the river that became western boundary of the US as a result of the American revolutionary war? What is the loch next to Loch Ness? Is Australia zoo the biggest zoo in the world? What are threats to the Great Sandy Desert? What island is the statue of liberty located on? What is the deepest place in the Caribbean Sea? Who is the second highest decorated veteran of World War 2 that became a TV actor? Can porpoises be found in red sea?