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February 2018

  In the world of theoretical computer science, P vs. NP is something of a mythical unicorn. It's become notorious, since it remains an unsolved problem. It basically asks this: If it is easy to check that a solution to a problem is correct, is it also easy to solve that problem? Get back

1) What is a mineral? A mineral is a naturally occurring inorganic crystalline substance, whose compositions are either fixed or vary between certain fixed limits. This excludes, for example, artificial diamonds, coal, volcanic glass. What makes each mineral unique is a combination of its chemical composition and the internal arrangement of its constituent atoms. The

Venus and the Triple Ultraviolet Sun Image Credit: NASA/SDO & the AIA, EVE, and HMI teams; Digital Composition: Peter L. Dove (http://www.flickr.com/photos/pldove/) Explanation: An unusual type of solar eclipse occurred in 2012. Usually, it is the Earth's Moon that eclipses the Sun. That year, most unusually, the planet Venus took a turn. Like a solar

Physical Properties of the Earth The Earth is an oblate spheroid, being slightly flattened at the poles: Equatorial radius = 6378 km Polar radius = 6357 km These measurements are calculated on the assumption that the Earth's surface is smooth, but this is only an approximation since it disregards mountains and ocean depths. However, the difference between

https://www.youtube.com/embed/K12JGiYHcTw?version=3&rel=1&fs=1&autohide=2&showsearch=0&showinfo=1&iv_load_policy=1&wmode=transparent By Joe Pickett, OCW Publication Director OCW has just published 21G.503 Japanese III, the third in a four-course sequence on Japanese taught at MIT. With relatively few Japanese speakers on the MIT campus, the instructors must make the most of what happens in the classroom and motivate students to work hard outside it.

New video by Kurzgesagt – In a Nutshell. Sharing this as it's very interesting for all to know :)   The first 688 people to use this link will get 20% off their annual membership: http://brilliant.org/nutshell Finding alien life on a distant planet would be amazing news - or would it? If we are not the only