Himself, Himself - Geologist, Himself - Author

Herself, Herself - Investigative Journalist, Herself - Investigative Journalist, Earthfiles

Himself, Himself - Egyptologist

Herself - Astrophysicist

Himself - Author

Himself - Archaeologist, Himself - Director, Himself - Director, Maya Exploration Center

Herself, Herself - Great Granddaughter of President Dwight D. Eisenhower