From PBS and NOVA - Our lives are going digital. We shop, bank and even date online. Computers hold our treasured photographs, private emails, and all of our personal information. This data is precious -- and ...
The Vikings were the most ferocious warriors of the Middle Ages. Especially fearsome were the select few who wielded a formidable weapon: a light, razor sharp, virtually indestructible sword with its maker's name, ULFBERHT, inlaid along the blade.
Nova investigates forensic science and examines how what is often perceived as rock solid forensic evidence can sometimes lead to wrongful convictions. It looks at a cases where false fingerprint and tooth impression matches have lead to wrongful accusations and convictions. It also examines how MRI and CT technology are now being used to determine causes of death. Finally, it examines problems in the forensics of the O.J. Simpson murder case and looks at how crime scene investigators use computers to record crime scenes in minute detail.
NOVA is reopening one of the most confounding crime mysteries of all time as a team of expert investigators employs state-of-the-art forensic and behavioral science techniques in an effort to determine what really happened to Charles Lindbergh's baby... and why.
The arms and faces of ancient statuary litter the seabed at the site of a shipwreck off the coast of Greece. But that's not the most interesting find. Encrusted with over 2,000 years of mineral deposits are highly engineered gears clearly visible as part of a mysterious device dating back to about 50 BCE. Using X-ray technology and working off of the realization that the gears' teeth are prime numbers relating to astronomy, the device is revealed to be the earliest known computer used for predicting eclipses and demonstrating planetary motion.
This four part series describes the origins and diversification of life on earth with Australia as a microcosm. This episode describes the history of Earth from its initial formation through the Cambrian explosion using Australian geological formations as examples.
In the early Paleozoic Australia is a coastal region of the super-continent Gondwana making it the scene of life's invasion of the land. But not all the action was on land as fish began to dominate the oceans and Australia has a wealth of superb fossils of early fish and other sea creatures.
Until recently there were very few known dinosaur fossils in Australia. But there are highways full of footprints which along with the recently found skeletal fossils tell uniquely Australian stories of plants, mammals, dinosaurs and other creatures.
The Paleogene opens with the dinosaurs extinct and much of the world's water freezing out in Antarctica as Australia breaks free of Gondwana to chart it's own course. As in the rest of the world mammals, birds and grasses rise to prominence but with an uniquely Australian flavor. Then the first placental mammals arrive.
On May 20th 2013, a ferocious F5 tornado over a mile wide tore through Moore, Oklahoma, inflicting 24 deaths and obliterating entire neighborhoods. It was the third time an exceptionally violent tornado had struck the city in 14 years. Yet predicting when and where these killer storms will hit still poses a huge challenge.