His general theory of relativity has proved accurate in predicting how light travels from some of the most distant galaxy clusters in the universe, according to new measurements.

Sensors rotate the display from portrait to landscape as required, turn off the display to conserve power when a user lifts the phone to his ear and adjusts its brightness according to the light.

The author finds out the key technique of making durable neon light in north area according to his many years test result, so as to improve the usage time of neon light.