Download Ebola: The Natural and Human History of a Deadly Virus by David Quammen PDF

By David Quammen

"A scary and interesting masterpiece of technological know-how reporting that reads like a detective story." —Walter Isaacson

In 1976 a dangerous virus emerged from the Congo woodland. As quickly because it got here, it disappeared, leaving no hint. Over the 4 a long time seeing that, Ebola has emerged sporadically, at any time when to devastating impression. it may kill as much as ninety percentage of its sufferers. In among those outbreaks, it's untraceable, hiding deep within the jungle. the quest is directly to locate Ebola's elusive host animal. And till we discover it, Ebola will proceed to strike. Acclaimed technological know-how author and explorer David Quammen first got here close to the virus whereas he was once touring within the jungles of Gabon, followed via neighborhood males whose village were devastated by means of a up to date outbreak. the following he tells the tale of Ebola—its previous, current, and its unknowable future.
Extracted from Spillover through David Quammen, up to date and with extra fabric.

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Modern DSLRs tend to have excellent ISO performance and produce great results at ISOs as high as 800. Even when you shoot at ISO 3200, the image is often acceptable for online use. It’s better to use a high ISO than to entirely miss a shot. Test your camera’s performance by taking a series of images with increasingly higher ISO settings. Take the series of images in the dark, then view the results at 100 percent magnification and look for image noise. After you perform this exercise, you’ll have a good idea of your camera’s maximum acceptable ISO speed.

Luck played a role for sure, but extensive planning and preparations were just as critical. Every year a few dozen of these rays visit a small bay in the Maldives, where they feed in waters that are particularly rich with plankton. National Geographic first reported on this phenomenon in 2008, and since then the area has become a tourist magnet where hundreds of divers and snorkelers try to find and swim with these majestic animals. But no one can say exactly when the manta rays will be in the area—sometime between August and October is the general consensus.

It’s possible that an O-ring hasn’t engaged properly. You should always have a backup connection cable and replacement O-rings on hand. Before you insert your camera into an underwater casing, remove all attachments, like the strap and eyecup, because they can get caught or prevent the housing from closing all the way. When you attach the sync cord to its port, insert the plug as far as it will go, then turn it to engage the threads, ensuring that you establish a good electrical connection. Sync cords tend to break easily, which is one reason you should always handle them with care and never store them with stress on the cable.

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