The introduction of contraception has contributed to a decline in the global birth rate.

The media often portrays the world as a place where violence and overpopulation are increasing.

Mann believes that in the future, wearable technology will allow people to protect their privacy rather than lose it.

The digital eye allows Mann to access the Internet and check his emails, but he avoids downloading large attachments.

Mann’s wife has never worn the digital eye herself but supports his research.

The earliest version of Mann’s wearable computer was small and lightweight.

James Fung, one of Mann’s students, used the digital eye to quickly find a scary story while socializing with friends.

Mann feels uncomfortable if he spends too much time without his digital eye.

Mann’s wearable computer is completely hidden and cannot be seen by others.

Mann invented the digital eye primarily for use by students to improve their learning.