Sarah Parcak is an American archaeologist and Egyptologist, who uses satellite imaging to identify archaeological sites in Egypt.

Parcak was born in Bangor, Maine, received her Bachelor's degree in Egyptology and Archaeological Studies from Yale University in 2001, and her Ph.D. from Cambridge University.

Parcak is also a TED Fellow.

Working with a team of physicists, Dr. Deborah Rhodes developed a new tool for tumor detection that's 3 times as effective as traditional mammograms for women with dense breast tissue.

The life-saving implications are stunning. So why haven't we heard of it? Rhodes shares the story behind the tool's creation, and the web of politics and economics that keep it from mainstream use.

Deborah Rhodes is an expert at managing breast-cancer risk. The director of the Mayo Clinic’s Executive Health Program is now testing a gamma camera that can see tumors that get missed by mammography.

For all of the lives it saves, mammography still cannot detect the early onset of breast cancer in as many as one of every four women ages 40 to 49.