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HTML

              
                <div class="container">
  <div class="jumbotron">
    <div class="row">
      <div class="col-xs-12">
        <h1 class="text-center">Richard Feynman</h1>
        <h3 class="text-center">1965 Nobel Prize in Physics</h3>
        <img src="https://i.imgur.com/cnArupB.jpg" class="img-rounded img-responsive" alt="Feynman in front of a blackboard filled with equations.">
      </div>
    </div>
    <div class="row">
      <div class="col-xs-8 content">
        <p> Richard Feynman was a theoretical physicist that had a tremendous influence in the development of areas such as: </p>
        <ul>
          <li>Quantum mechanics</li>            
          <li>Quantum eletrodynamics</li>          
          <li>Quantum computing</li>
          <li>Particle physics</li>
          <li>Nanotechnology</li>                    
        </ul>      
        <p> If you want to read more about him, check out his <a href="https://en.wikipedia.org/wiki/Richard_Feynman">wikipedia page</a>!
      </div>
      <div class="col-xs-4 sidebar">
        <h5 class="text-center sidebar-header">books!</h5>
        <h4 class="text-center"> Check out these books written by him: </h4>     
        <hr>
        <ul>
          <li><a href="https://en.wikipedia.org/wiki/Surely_You%27re_Joking,_Mr._Feynman!">Surely You're Joking, Mr. Feynman!</a></li>
          <li><a href="https://en.wikipedia.org/wiki/What_Do_You_Care_What_Other_People_Think%3F">What Do You Care What Other People Think?</a></li>
          <li><a href="https://en.wikipedia.org/wiki/The_Feynman_Lectures_on_Physics">The Feynman Lectures on Physics</a></li>
        </ul>        
      </div>
    </div>
  </div>
  <hr>
  <h5 class="text-center"> Written and coded by <a href="https://www.freecodecamp.com/ferrazoli">Daniel Ferrazoli</a></h5>
</div>
              
            
!

CSS

              
                .container {
  margin-top: 25px;  
}
.jumbotron {
  padding-top: 5px;
  padding-bottom: 10px;
}
img {
  margin-top: 20px;
}
hr {
  border-color: rgb(122,139,154);
}
.sidebar {
  background-color: LightGray;
  border-radius: 20px;
  margin-top: 10px;    
}
.content {
  margin-top: 10px;    
}
.sidebar-header {
  background-color: rgb(122,139,154);
  border-radius: 5px;
  color: white;
  margin-bottom: 15px;
}

              
            
!

JS

              
                
              
            
!
999px

Console