Changes

Einstein compared the effects of large objects on space and time to the way that a large ball placed on a sheet of rubber stretches the material and causes it to sag, and drew the analogy with the way stars and planets warp space-time. A smaller ball rolling along the sagging fabric will be drawn towards the larger ball, in the same way that the Earth is drawn towards the sun, but will not fall into it as long as it continues to move at sufficient speed. This was a change in thinking from the Newtonian cosmos, in which gravity was viewed purely as an attractive force between bodies.

Einstein compared the effects of large objects on space and time to the way that a large ball placed on a sheet of rubber stretches the material and causes it to sag, and drew the analogy with the way stars and planets warp space-time. A smaller ball rolling along the sagging fabric will be drawn towards the larger ball, in the same way that the Earth is drawn towards the sun, but will not fall into it as long as it continues to move at sufficient speed. This was a change in thinking from the Newtonian cosmos, in which gravity was viewed purely as an attractive force between bodies.

Einstein gave a statistical explanation of Brownian motion (the random movement of microscopic particles mixed in with pollen).<ref>http://www.aip.org/history/einstein/essay-brownian.htm Einstein on Brownian Motion]</ref>

Einstein's statistical explanation of Brownian motion (the random movement of microscopic particles mixed in with pollen) helped confirm the atomic theory at a time when some scientists argued against it.<ref>[http://www.aip.org/history/einstein/essay-brownian.htm Einstein on Brownian Motion]</ref>

===E=mc²===

===E=mc²===