Posts tagged Survival

Activision have released some new screenshots for Call of Duty: Black Ops II showing Multiplayer and a return of the Zombies.

And the Zombies are back! Call of Duty: Black Ops II Zombies features three different ways to survive the zombie apocalypse. Unravel the mysteries of a dying Earth in Tranzit, fight endless waves of zombies in Survival mode, or compete in the new 4z4 last-human-standing mode Grief.

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(Source: futurenow321)

During a thunderstorm, a mosquito would likely be hit about every 25 seconds. They obviously aren’t dodging raindrops, as appealing as the mental image may be.

So the researchers created a “flight arena” to study mosquito-raindrop collisions essentially a five centimeter wide, 20 centimeter tall rectangular mesh cage. In order to simulate raindrops falling at their terminal velocity (which would otherwise require a height of 10 meters) they shot a water jet point-blank into the cage of mosquitos.

To figure out what was happening during midair collisions, the authors shot a strong, 9m/s jet into the cage, and observed the impact with six mosquitos. In all of these collisions, the insects tumbled down the cage, getting hit repeatedly, before separating from the jet and landing on the side of the cage. This jet is actually stronger than terminal velocity raindrops, so this test shows that mosquitos would survive such an impact.

Confirming an earlier prediction, the team found that most drops impacted on the wings and legs, rather than the bodies—the body only makes up one-quarter of the potential impact area. This results in a quick, glancing blow that essentially rotates the insect (either pitch, yaw, or roll). The contact lasts a fraction of a second, after which the mosquito quickly recovers.

But direct hits to the body did happen. When rain falls on a stiff object, like a tree branch, the drops spread out very quickly. This rapid momentum transfer results in a strong impact force, roughly 10,000 times the weight of a mosquito. In other words, splat.

(Source: futurenow321)

When it comes to adapting to climate change, diversity is the mammal’s best defense.

That is one of the conclusions of the first study of how mammals in North America adapted to climate change in “deep time” – a period of 56 million years beginning with the Eocene and ending 12,000 years ago with the terminal Pleistocene extinction when mammoths, saber-toothed tigers, giant sloths and most of the other megafauna on the continent disappeared.

“Before we can predict how mammals will respond to climate change in the future, we need to understand how they responded to climate change in the assistant professor of earth and environmental studies at Vanderbilt who directed the study. “It is particularly important to establish a baseline that shows how they adapted before humans came on the scene to complicate the picture.”Establishing such a baseline is particularly important for mammals because their ability to adapt to environmental changes makes it difficult to predict how they will respond. For example, mammals have demonstrated the ability to dramatically alter their size and completely change their diet when their environment is altered. In addition, mammals have the mobility to move as the environment shifts.

(Source: futurenow321)