memomedo2018 writes: It opened on 1 June 2016, and full service began on 11 December 2016. With a route length of 57.09 km (35.5 mi), it is the world's longest and deepest traffic tunnel and the first flat, low-level route through the Alps.
The project consists of two single-track tunnels connecting Erstfeld (Uri) with Bodio (Ticino) and passing below Sedrun (Graubünden). It is part of the AlpTransit project, also known as the New Railway Link through the Alps (NRLA), which also includes the Ceneri Base Tunnel further south (scheduled to open late 2020) and the Lötschberg Base Tunnel on the other main north-south axis. The base tunnel bypasses most of the Gotthard Railway, a winding mountain route opened in 1882 across the Saint-Gotthard Massif, which is now operating at capacity, and establishes a direct route usable by high-speed rail and heavy freight trains. It is the third tunnel connecting the cantons of Uri and Ticino after the Gotthard Tunnel and the Gotthard Road Tunnel. Link to Original Source
memomedo2018 writes: The temperature record of the past 1000 years describes the reconstruction of temperature for the last 1000 years on the Northern Hemisphere.
A reconstruction is needed because a reliable surface temperature record exists only since about 1850.
Studying past climate is of interest for scientists in order to improve the understanding of current climate variability and, relatedly, providing a better basis for future climate projections.
In particular, if the nature and magnitude of natural climate variability can be established, scientists will be better positioned to identify and quantify human generated climate variability.
Although temperature reconstructions from proxy data help us understand the character of natural climate variability, attribution of recent climate change relies on a broad range of methodologies in addition to the proxy reconstructions. By far the best observed period is from 1850 to the present day.
Over this period the recent instrumental records, mainly based on direct thermometer readings, has approximately global coverage. It shows a general warming in global temperatures.
MojoKid writes: "Samsung's Galaxy Tab 10.1 was announced way back in February this year just prior to Apple's iPad 2 launch. Shortly after, a Samsung VP noted the company was re-evaluating their Galaxy Tab line in the wake of Apple's strong iPad 2 showing in early March. Since then, the Galaxy Tab 10.1 has begun shipping and early reports show the Android 3.1 driven device to be slightly thinner than the iPad 2, lighter and with NVIDIA's 1GHz dual-core Tegra 2 processor under the hood, every bit as capable. With recent Honeycomb entrants in the 10-inch Android tablet market, like the Asus Transformer, Motorola Xoom and Samsung Galaxy Tab 10.1, the iPad 2 finally has solid competition in terms of both hardware and OS performance."
from the new-perspective-on-an-old-tragedy dept.
longacre writes "An amateur video of the 1986 Space Shuttle Challenger explosion has been made public for the first time. The Florida man who filmed it from his front yard on his new Betamax camcorder turned the tape over to an educational organization a week before he died this past December. The Space Exploration Archive has since published the video into the public domain in time for the 24th anniversary of the catastrophe. Despite being shot from about 70 miles from Cape Canaveral, the shuttle and the explosion can be seen quite clearly. It is unclear why he never shared the footage with NASA or the media. NASA officials say they were not aware of the video, but are interested in examining it now that it has been made available."