A new type of extinguisher that uses sound waves to put out fires has been built by two engineering students in the US. Both chemical- and water-free, the invention offers a relatively non-destructive method of fire control, which could find applications in fighting small fires in the home, and the researchers now hold a preliminary patent application for their device.
While the concept of using sound waves to extinguish flames is not new, previous attempts to realize the principle – including efforts by teams at West Georgia University and the US Defense Advanced Research Projects Agency (DARPA) – had not been successful.
Undeterred by this, as well as initial [...]
Bacteria living in and on the human body is one of those disgusting facts that we all try to forget, but science is showing that if we want to obtain optimal health, we humans really should think about our microscopic partners in this life.
1. You are more bacteria than human.
Human cells account for just 10 percent of the cellular matter of the animals we call humans. The other 90% are bacterial cells that live on or in our bodies. To give you an idea of the numbers we’re talking about here, it is estimated that the human body is made of about ten trillion cells, but there are 100 [...]