A list of <a href="">Wikipedia</a> articles to learn about Einstein and his work.
  <ul>  
    <li><a href="Albert_Einstein" target="_blank">Albert Einstein</a></li>
    <li><a href="String_theory" target="_blank">String theory</a></li>
    <li><a href="Theory_of_relativity" target="_blank">Theory of relativity</a></li>
    <li><a href="Wormhole" target="_blank">Wormhole</a></li>
  </ul>

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