entertainment: what was the title of vanilla ice's 1990 number 1 hit?

Questions

Branch of biology dealing with the development of the animal embryo?

Branch of mathematics that deals with the properties & relationships of numbers (number)?

Branch of mathematics that deals with the relationships between the sides & angles of triangles & with the properties & applications of the trigonometric functions of angles?

Branch of science that applies physical principles to the study of the earth?

Breed of rock pigeon that is specially trained to return swiftly to its home?