Gravity: What’s Up Is Down

GRAVITY: WHAT’S UP IS DOWN – The mysteries of gravity are taking scientists to the frontiers of the universe. Scientists are building huge devices on earth to measure gravity from the deepest reaches of the outer space. They say these gravity observatories will be as revolutionary as the first telescope; and will completely change our image of the universe. Living on Earth contributor Bob Carty prepared this report on the ups and downs of the Big “G”.