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A promising cancer treatment that blasts tumors using soundwaves has been approved in the US. A machine that uses histotripsy, a technique that uses sound waves to break down tumors, has been approved to treat liver tumors by the US Food and Drug Administration (FDA). It uses targeted sound waves - like an ultrasound machine - to form microbubbles within the tumor. The forces generated as the bubbles expand and collapse rapidly cause the cancerous mass to break apart, destroying tumor cells and leaving the debris to be eliminated by the immune system.

This video allows you to test yourself to see if you like 440 Hz or 432 Hz better. You won't know which sample is which. Listen to each and see if you like one better than the other or if one feels better to you than the other and draw your own conclusions.

A new ultrasound device, used in conjunction with magnetic resonance imaging (MRI), allows neurosurgeons to precisely burn out small pieces of malfunctioning brain tissue without cutting the skin or opening the skull. A preliminary study from Switzerland involving nine patients with chronic pain shows that the technology can be used safely in humans. The researchers now aim to test it in patients with other disorders, such as Parkinson's disease. "The groundbreaking finding here is that you can make lesions deep in the brain--through the intact skull and skin--with extreme precision and accuracy and safety," says Neal Kassell, a neurosurgeon at...

Big bang sound waves explain galaxy clustering 13:32 12 January 2005 NewScientist.com news service Maggie McKee, San Diego Sound waves that roared through space after the big bang left behind a subtle imprint in the way galaxies are clustered today, reveal two major studies. The results bolster the standard theory that the universe is flat, and measuring the distance between the sound ripples may provide a new cosmic yardstick to probe the past. Two independent teams mapping the universe have found that galaxies are currently huddled together slightly more often at distances of 500 million light years as a...