Word: vacuums
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Dates: during 2000-2009
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Those riveting Earth photos reframed everything. For the first time humanity saw itself from outside. The visible features from space were living blue ocean, living green-brown continents, dazzling polar ice and a busy atmosphere, all set like a delicate jewel in vast immensities of hard-vacuum space. Humanity's habitat looked tiny, fragile and rare...
...know, is with matter that has negative density. In layman's terms, that's stuff that weighs less than nothing. This may sound impossible, but the Dutch physicist Hendrik Casimir theorized in 1948 that holding two plates of electrically conducting material very close together in a vacuum actually does create a region of negative density that exerts an inward pressure on the plates. The force predicted by Casimir has been verified in the laboratory...
Forget it, though. You'll never go that fast. Albert Einstein said so. His special theory of relativity had at its heart an astonishing claim: the speed of light in a vacuum is always the same, for all observers. Shine a flashlight out into space and the light goes at 186,000 m.p.s. Jump into a spaceship and chase the beam at 185,000 m.p.s. and it recedes from you not at 1,000 m.p.s. but at 186,000 m.p.s. If you head in the opposite direction at 185,000 m.p.s., the light beam still moves away at...you guessed...
...reveal the secrets of life in seven easy steps--to live on not for the lessons they impart but as poignant reminders of a cultural period. How to Win Friends & Influence People evokes a time of polyester salesmen tooling through leafy suburbs in aqua Buicks, hawking insurance policies and vacuum cleaners. Jonathan Livingston Seagull takes us back to an era when vegetarians in Earth Shoes tramped the countryside stalking the wild asparagus. Easy to read and easier to forget, they are books we look back on shaking our heads in amusement and disbelief. Were we ever really that small, that...
...Israel. Chances of an early breakthrough may be diminished by Israel's Lebanon withdrawal - which deprives Syria, with its substantial military control over Lebanon, of a key bargaining chip - as well as by Bill Clinton's imminent departure from the Oval Office. Despite the dangers created by a power vacuum in southern Lebanon, both Israel and Syria are likely to be careful to keep any escalation of hostilities within manageable limits. "Assad appears uninterested in peace on the terms Israel has offered," says Beyer. "But that doesn't mean he wants a war, and he'll work as hard...