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At Virginia Polytechnic Institute and State University, Christopher Williams heads the effort to further advance 3-D printing with copper, a widely used conductor in electronics. Williams is using a process called binder jetting in which an inkjet printer selectively jets glue into a bed of copper powder, layer-by-layer. The printed copper product is then taken to a furnace to fuse the particles together. With support from the National Science Foundation, Williams is addressing a major challenge in the 3-D copper printing process, which is to eliminate the porosity that develops in the part during the process. Part of the National Science Foundation Series “Science Nation.”
(Source: DCMP)
Stephen Fry, writer and actor, gathers a team of craftsmen to help him build a copy of Gutenberg's printing press and sets himself the task of learning how to make the paper and type to print as Gutenberg once did. These practical trials and tests demonstrate the brilliance of Gutenberg's invention and bring the man and his machine to life. Also investigates why printing mattered so much to Gutenberg and his contemporaries, exploring the political and religious turmoil that shaped Gutenberg's world.
Communication between people and cultures initially stemmed from trade and commerce. With Guttenberg's invention of the printing press, information was available to people beyond the elite and wealthy for the first time. Trade drew explorers out into the oceans, and mapmakers outlined their treacherous journeys. These basic maps are what led Columbus to believe he could reach the East by sailing west. Instead he found America, and established trade routes between America and Europe.
The transplanting of bone tissue, known as bone grafting, typically involves allograft, which is bone from a deceased donor, or autograft, which comes from the patient's own body. With support from the National Science Foundation, materials scientist Ramille Shah and materials engineer Adam Jakus are working to develop and improve synthetic materials available for bone grafting. Part of the "Science Nation" series.
Timeblazers Jen and Sam travel back 63 million years before the first primitive people appeared on Earth, and they learn that people and dinosaurs never met. They jump to the Paleolithic age, when humans first appeared, to see some "cavemen," as they are often called. About 8000 BCE the first primitive civilizations began to develop after humans started farming. Then to 3100 BCE: The Egyptians. Around 750 BCE came the ancient Greek civilization; then from about 27 BCE to 476 CE came the Roman Empire. Then came the Middle Ages from 500 to about the year 1400, the Renaissance.
