ABSTRACT
Gravity promises to be the best method for detecting a secret underground facility. This chapter examines the reasons why this is so and reviews a field study conducted to prove this hypothesis. The potential for gravity to be useful in this problem may not be immediately obvious. The chapter establishes that the measured gravity anomaly is proportional to the volume of the feature, and the difference between the density of the feature and its surroundings. The gravity method will be further illustrated through the description of two case studies. The first, involves the use of gravity to detect and locate an underground structure that might be typical of a secret military facility. The second deals with the location of a massive object that might be relevant to the cause of dinosaur extinction. Consequently, a relatively slow increase or decrease in the global temperature could result in all individuals in the dinosaur or reptile populations being either male or female.
