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The Touching Brain

Our brain and skin are initially part of the same primitive formation during prenatal development, but they are separated during the process of neurogenesis (the embroyo's production of brain cells). Thus, in a sense, our skin is the 'other half' of our brain. This, perhaps, explains why at nearly all stages of life, one learns a great deal about ...

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TheTouchingBrain
Geology

What Is The Most Damaging Hazard From A Hurricane?

The greatest potential for loss of life and property related to a hurricane is from the storm surge—water pushed ashore by the force of the winds accompanying a hurricane. Although hurricanes are ... Continue reading

Hurricane
Medicine

Facts About Angina

Angina is a recurring pain or discomfort in the chest that happens when some part of the heart does not receive enough blood. It is a common symptom of coronary heart disease (CHD), which occurs when ... Continue reading

FactsAboutAngina
Biology

Hey Nose-Brain!

Sex, food, and smell are linked in our brain by ancient pathways governing appetite, odor detection, and hormones. In fact, another name for the brain's limbic system (a primitive ... Continue reading

NoseBrain
Geology

Sedimentary Rock

Sedimentary rock is one of three rock types on earth. Rock types are classified according to how the rock is formed. Igneous rock forms as it cools to a solid from molten rock. Metamorphic rock forms ... Continue reading

SedimentaryRock

NASA's First Historic Challenge

NASAsFirstHistoricChallengeIn a time of uncertainty at home and abroad, an American president proposes bold new steps in the exploration of space. He calls for 'longer strides' which 'may hold the key to our future here on Earth.' He touts the potential of 'even more exciting and ambitious exploration of space, perhaps beyond the moon, perhaps to the very end of the solar system itself.' The year is 1961. The president is John F. Kennedy. But the words ring true today, as NASA aims for new frontiers with a new Vision for Space Exploration. Kennedy's 'Special Message to Congress on Urgent National Needs' came on May 25, just three weeks after Mercury astronaut Alan B. Shepard became the first American in space. Delivered at the height of the Cold War with the Soviet Union, the speech is best known for Kennedy's audacious challenge to NASA and America. 'I believe that this nation should commit itself to achieving the goal, before this decade is out, of landing a man on the moon and returning him safely to Earth.'

NASA fulfilled that goal on July 20, 1969, when Apollo 11's lunar module Eagle touched down in the Sea of Tranquility, with Neil Armstrong and Buzz Aldrin aboard. A dozen men would walk on the moon before the Apollo program ended. The last of those men, Gene Cernan, left the desolate lunar surface with these words: 'We leave as we came and, God willing, as we shall return, with peace and hope for all mankind.' Now, NASA is indeed looking to return to the moon, as well as planning new journeys to Mars and beyond. Much has changed in the 43 years since Kennedy's speech. Our Cold War Soviet rivals are now our Russian partners on the International Space Station. And the technological feats Kennedy helped initiate have spawned countless tangible benefits on Earth. Medical technologies, weather forecasting, computer technology and telecommunications can all trace their origins to the space program.

What hasn't changed is the spirit of exploration and discovery. Announcing NASA's new initiative in January 2004, President Bush put it this way: 'Mankind is drawn to the heavens for the same reason we were once drawn into unknown lands and across the open sea. We choose to explore space because doing so improves our lives, and lifts our national spirit.' Chris Cassidy, a member of NASA's 2004 astronaut class, puts the need to explore in more personal terms. 'I hope to be the next guy on the moon.'