t id="unit-second" name="unit" type="radio" value="second"><!--
              --><label for="unit-second">second</label>
            </span>
          </div>
          <p><em id="result">...</em> needed, in order to have a 1% probability of at least one collision.</p>
          <div class="snippet">
            <button id="copy-btn"></button>
            <code id="code-sample"></code>
          </div>
        </div>
        <h2>A Few Values to Feel the Scale</h2>
        <ul>
          <li>Human lifespan: 7