Danish teenager Harald Olufsen, having stumbled upon the secret that is responsible for Germany's success in beating back the attacks of England's Royal Air Force in 1941, undertakes a dangerous, six-hundred-mile journey in a derelict airplane with his friend Karen, in an effort to get word to England and turn the course of the war.

"Tells the story of a laser technology that will have a big impact on society and the brilliant innovators responsible for its development"--

Lean about the similarities between radar technology and a bat's built-in echolocation system.

In 1943, a secret government project attempted to create a cloaking device that would make warships invisible. But during the first test, the warship vanished - and could not be found again. Seventy years later, it reappears on a Pennsylvania runway, allowing the sole surviving crewman to escape and a local lawman to board. What is behind a sinister reactivation of the project? Where will the massive ship materialize next? And what will become of...

A moving and inspiring factual drama about the pioneering work on radar by a little know team of scientists in the run up to the Second World War. On 26 February 1935, Robert Watson-Watt demonstrated for the first time that aircraft could be detected by bouncing radio waves off them. By the time the war began in 1939, radar stations were dotted along the British coast, tracking aircraft at distances of 100 miles away.

As the Apollo 11 mission draws to a close there is a crisis at the tracking station on Guam: the antenna that will track the spacecraft during reentry, and allow mission control to communicate with the astronauts is stuck--and ten-year-old Marty is the only one small enough to reach in and grease the ball bearings that allow the antenna to move.

In March 1941, after a year of unbroken and devastating U-boat onslaughts, the British War Cabinet decided to try a new strategy in the foundering naval campaign. To do so, they hired an intensely private, bohemian physicist who was also an ardent socialist. Patrick Blackett was a former navy officer and future winner of the Nobel Prize; he is little remembered today, but he and his fellow scientists did as much to win the war against Nazi Germany...

"For 80 Sappho, 356 Liguria, 694 Ekard, and 2340 Hathor, data were taken simultaneously in the same sense of circular polarization as transmitted (SC) as well as in the opposite (OC) sense. Graphs show the average OC and SC radar echo power spectra soothed to a resolution of EFB Hz and plotted against Doppler frequency. Radar observations of the peculiar object 2201 Oljato reveal an unusual set of echo power spectra. The albedo and polarization ratio...