Animated map of the solar system shows just how far humans have explored spaceRob Ludacer
So far, we have tried to make contact with Mars 40 times. The former USSR led the first five missions, which took place from 1960 to 1962. All the missions were flybys of the planet, meaning that vessels were to orbit Mars to send back images. Those missions were all failures; either...
See more space shuttle pictures. Photo courtesy NASA In its nearly 30-year history, the space shuttle program has seen exhilarating highs and devastating lows. The fleet has taken astronauts on dozens of successful missions, resulting in immeasurable scientific gains. But this success has had...
To put it simply, a salmon essentially flies through the sea, and a pelican swims through the air. The core of the matter is this: Even a clear sky isn't empty. Our atmosphere is a massive fluid layer, and the right application of physics makes it possible for humans to traverse it....
The time limit per attempt was four minutes. Participants were asked to press the space bar when they believed that they had found the solution of an instance, to submit the solution. Submitted attempts were rewarded based on an economic performance measure that increased in closeness in values ...
Humans overwhelmingly live in valleys, and on supplies of fresh water. ___, if you head downhill, and follow any H2O you find, you should ___see signs of people. If you’ve explored the area before, keep an eye out for familiar sights—you may be ___how qu...
s oceans. By comparison, we havephotographed 99% of the moon’ssurface. There are likely entire species in the darkest depths of the sea that scientists haven’t even discovered yet. Robots are helping explorers traverse these realms of the deep, where water pressure is far too high for ...
The search for extraterrestrial intelligence dates back at least a century, a period in which humans have devised numerous ways to look for intelligent life elsewhere in the universe. These attempts generally rely on the idea that alien civilizations must be broadcasting signals into space, perhaps...
See more space shuttle pictures. Photo courtesy NASA In its nearly 30-year history, the space shuttle program has seen exhilarating highs and devastating lows. The fleet has taken astronauts on dozens of successful missions, resulting in immeasurable scientific gains. But this success has had...
How can these animals survive so far from the sunlight, under these extreme conditions? In the water, scientists found species of bacteria that split hydrogen sulfide from the water to get energy to make organic compounds (chemosynthesis). The tubeworms have bacteria in their tissues that help ...