But watching the mega-maser respond to the gravity of its host black hole means we can actually measure whether gravity is the same on the other side of the universe.

通过观察巨型脉泽对其黑洞主人万有引力的反应，我们就能够实际测量万有引力在宇宙中的其它地方是否也是一样的。

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Around a brilliant Hockney-blue swimming pool, a host of plump black cherubs shriek and splash with pleasure.

BBC: Rwanda's tug-of-war children

An additional woe for brick and mortar retailers comes courtesy of online retail behemoth Amazon, who just announced that they will host a 2011 Black Friday sale.

FORBES: Only One Shopping Day Left 'Til Tomorrow

Russia's role as Olympic host got another black eye after a top Russian crime lord was gunned down last week in Moscow in what police described as a war between two powerful mobs over lucrative construction projects, allegedly including ones for the 2014 Sochi games.

NPR: Invest Now, Russia Says _ But Warning Signs Loom