An example is a sensor having a switch approximately 1.5 nanometers across, capable of counting specific molecules in a chemical sample.

With its abundance of natural resources and the tremendous capacity of its peoples to be agents of change, Africa holds the key to its own development.

With two thirds of the world's poor residing in Asia and the Pacific, it is clear that the region holds the key to solving the global poverty challenge.

Upon visiting Gaza, John Dugard, the United Nations Special Rapporteur on Human Rights, said that Gaza is a prison and Israel seems to have thrown away the key.

Twitter s vulnerabilities were technically understood before this event, and the service was already moving toward a more sophisticated authentication model (a password paired with a one time key from a text message or other device).

E minor (Em, Mim) is a minor scale based on the note E. The E natural minor scale ( ) consists of the pitches E, F, G, A, B, C, and D. The E harmonic minor scale ( ) contains the natural 7, D, rather than the flatted 7, D to align with the major dominant chord, B7 (B D F A).