But telling alien civilizations when we lived and how Earth was in our time is not the main objective of this 406kg metal sphere.

但是，告诉外星文明我们正处在地球的哪一时期并不是这个406公斤的金属球体的主要任务。

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If the universe's space-time is positively curved, like the surface of a sphere, parallel beams would come together.

如果宇宙的时空像球体表面一样正向弯曲，平行的光线就会交合在一起。

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At the same time, being flatter than a sphere, the aerostat ACTS less like a sail than a traditional balloon does, making it easier to steer.

同时，由于比球体扁平，此高空气球不像传统气球般随风飘动，它更容易操控。

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All of this happened smoothly, in real time, and in a full sphere of vision.

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In an "Immersion Lab" a few floors above the Business Sphere, employees test out working across time zones on wall-size video screens, and projecting business and social network information on man-size "holopanes" of glass.

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"We know that there is a great body of evidence now that has been gathered over the past 20 or 30 years which demonstrates that, where you have schools which give time to cultural learning, there is benefit both in that sphere and also to the other disciplines, " Sir Nicholas said.

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