"A strong signal must be sent out that a nuclear test is against the will of the international community, " he told Reuters news agency.

BBC: US seeks UN sanctions targeting North Korea diplomats

The ultimate test, however, would be to look for a special signal in the CMB referred to as B-Modes.

BBC: The first fractions of a second after the Big Bang

Perched atop a tower overlooking Arafat and getting a live broadcast signal out through a videophone presents technological challenges that would test anybody's patience.

CNN: Arafat: The climax of Hajj

Early last year, American officials had encouraged their Afghan counterparts to find a test case for Karzai: a powerful senior official whose indictment would signal that the President was finally serious about cleaning up his government.

NEWYORKER: The Afghan Bank Heist

When a test train this week was parked in the same location, the control circuitry did not signal that it was there.

CNN: Metro driver called a hero who saved lives in crash

Our standard battery rundown test involves setting the brightness and volume to half, using 4G in a 75 percent or better signal area, enabling GPS and WiFi (not connected) and disabling Bluetooth while looping a video from a full charge until the battery is drained.

ENGADGET: LG Optimus G review: a quad-core powerhouse with Nexus aspirations

So to test it I placed the router by the window in the bedroom where I can never get a good signal in the wee hours of the night.

FORBES: Free Internet From FreedomPop: Hands-On and Unplugged at Home

Now comes news that a gene test sold by Celera that claims to predict elevated risk of heart disease may be badly flawed and not signal heart risk at all.

FORBES: Why You Shouldn't Trust Newfangled Gene Tests

To test the idea on a grand scale, researchers at Wageningen University and the Royal Netherlands Meteorological Institute acquired the signal strengths from 2, 400 links operated by T-Mobile NL, over two 12-day periods in 2011.

BBC: Rain tracked with mobile network