Newton wrote down his theory of gravity.

牛顿写下了他的重力理论。

Evolution is a fact as much as the " theory of gravity."

进化就像重力理论一样是一种事实。

But the most tantalising thing about Einstein's theory of gravity is we know that it's not complete.

然而相对论最令人着迷的一点是，它依旧还有待我们继续完善。

Sheperd Doeleman: Over 100 years ago, Einstein came up with this geometric theory of gravity which deforms space-time.

100多年前，爱因斯坦提出了这个引力几何理论，它改变了时空观念。

Yes. He came up with the theory of gravity while sitting in a field and seeing an apple fall from a tree.

是的。当他坐在田野里看到一个苹果从树上掉下来时，他想到了万有引力理论。

But I don't think there is any scientist who would disagree with its use in the context of Einstein's theory of gravity.

但我敢说，没有一个科学家会反对用“完美”来形容爱因斯坦的相对论。

One has to use a quantum theory of gravity to understand how the universe began.

人们必须使用量子引力理论来理解宇宙是如何开始的。

Newton wasn’t working in the orchard when the apple hit him and he devised the theory of gravity.

当苹果击中牛顿时， 牛顿并没有在果园里工作， 他发明了引力理论。

So one has to use a quantum theory of gravity to discuss the very early stages of the universe.

因此，人们必须使用量子引力理论来讨论宇宙的早期阶段。

And the answer to that is that it solves a lot of the problems that we get when we try to unify quantum mechanics and Einstein's theory of gravity.

答案是，它解决了我们在统一量子力学和爱因斯坦引力理论时遇到的很多问题。

In fact, it is not really consistent to treat light like cannonballs in Newton's theory of gravity because the speed of light is fixed.

其实牛顿万有引力理论中把光当成炮弹来处理其实并不一致，因为光速是固定的。

Einstein made a number of unsuccessful attempts between 1908 and 1914 to find a theory of gravity that was consistent with special relativity.

爱因斯坦在 1908 年至 1914 年期间多次尝试寻找与狭义相对论一致的引力理论，但均未成功。

For example, very accurate observations of the planet Mercury revealed a small difference between its motion and the predictions of Newton's theory of gravity.

例如，对水星行星的非常准确的观察揭示了它的运动与牛顿引力理论的预测之间的微小差异。

Some scientists believe that it could be linked to the quantum fluctuations in empty space, while others propose new theories of gravity or even the existence of other dimensions.

一些科学家认为，这可能与真空中的量子涨落有关，而另一些科学家则提出了新的引力理论，甚至其他维度的存在。

In fact, the orbits of the planets predicted by general relativity are almost exactly the same as those predicted by the Newtonian theory of gravity.

事实上，广义相对论所预测的行星轨道与牛顿万有引力理论所预测的几乎完全一致。

Even those who realized that Newton's theory of gravity showed that the universe could not be static did not think to suggest that it might be expanding.

甚至那些意识到牛顿引力理论表明宇宙不可能是静止的人也没有想到暗示它可能在膨胀。

Cambridge alumni have been involved with developing some of the most important science ideas of the last few hundred years, for example, the theory of gravity, the theory of evolution, the structure of DNA, and so on.

剑桥大学的校友们参与提出了一些在过去的几百年里最重要的科学理念，如：万有引力定律、进化论、DNA的构造等等。

It was this that led to the first hints of how the theories of quantum mechanics and general relativity might affect each other—a glimpse of the shape of a quantum theory of gravity yet to come.

正是这一点导致了量子力学和广义相对论如何相互影响的第一个暗示——瞥见了尚未出现的量子引力理论的形状。