Alvarez had studied the work of his colleague Juan Vucetich, head of the bureau of statistics for the La Plata police. Vucetich had discovered a method of analyzing and classifying fingerprints that made them easy both to file and, equally vital, to retrieve. Until then, the police authorities had largely ignored his work. But because of the Rojas case and subsequent successes, Argentina adopted fingerprinting as its sole method of identifying criminals – the first country in the world to do so.

Astronomers have spotted a large and 'potentially hazardous' asteroid heading towards Earth and it is only less than a month away from passing within four million miles.
The object is 150 metres in diameter and has been named '2010 ST3'. It was discovered using the Panoramic Survey Telescope & Rapid Response System (Pan-STARRS) PS1 telescope in images taken on Sept 16 reports Mail Online, when it was about twenty million miles away.

Deep in the Arizona desert, about 20 miles from Tucson, Arizona, sits one of the most spectacular science experiments on earth ... Biosphere 2. This giant glass environment contains several ecosystems that were originally designed to study our ability to create an earth-like environment on another planet. Today, you can tour the facility and see the on-going scientific studies that are taking place today. One of the most fascinating tours you may ever take!