Friday's HOT MIC
As our friend Glenn Reynolds (Instapundit himself) likes to say: I'm not saying it's aliens, but it's aliens.
Scientists have captured a mysterious hum coming from deep inside the Earth, but they are still no closer to working out what it is. It has long been known that the Earth constantly generates a low-frequency vibrational signal. The first attempt to detect this hum was made in 1959, but it wasn't until 1998 that scientists finally proved its existence. Since then, there have been hundreds of attempts to record the Earth's hum, but they have all been made using seismometers on land.
Now researchers have captured the hum for the first time using seismic instruments at the bottom of the sea... These vibrations can't be heard by people, because they are approximately 10,000 times smaller than the lower hearing threshold of the human ear (20 hertz).
However, the fact that they have been detected at the bottom of the ocean, and around 70% of the planet's surface is covered by water, suggests that the hum is present across the entire globe. The research team, led by Martha Deen at the Paris Institute of Earth Physics, hopes the new data will provide clues as to the source of the hum.
I think we've all seen this movie before...