After transition is complete, show the div

Problem

Dear Stackoverflow readers,

Using only CSS3, how do I show a div after a transition is completed.

This is the snippet of HTML I'm working with

<div class="biography">
      <p>Title</p>
      <p id="moreBio">This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test. This is a test.</p>
</div>

This is the snippet of CSS3 I'm working with

.biography {
    width: 100px;
    height: 40px;
    float: left;
    margin: 5px;
    background: #3399FF;
    color: #ffffff;
    box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.5);
    position: relative;
    right: 5%;
    font-weight: bold;
    font-size: 15px;
    text-align: center;
    padding: 10px;
    border-radius: 5px;
    opacity: 0.4;
    transition: all 0.5s ease;
    -webkit-transition: all 0.5s ease;
    -o-transition: all 0.5s ease;
    -moz-transition: all 0.5s ease;
}
.biography:hover {
    width: 200px;
    height: 600px;
    margin: 10px 10px 0px -100px;
    opacity: 1;
    background: #7C7C7C;
}
#moreBio {
    opacity: 0;
    transition: opacity 0.5s ease;
    -webkit-transition: opacity 0.5s ease;
    -o-transition: opacity 0.5s ease;
    -moz-transition: opacity 0.5s ease;
}
#moreBio:hover {
    opacity: 1;
}

I want #moreBio to show after the transition is completed, how would I go about doing that?

Thank you so much in advance.

Problem courtesy of: Tony

Solution

Add a transition-delay to #moreBio equal to the transition time of .biography, and make the appearance trigger when .biography is hovered upon.

#moreBio {
    opacity: 0;
    transition: opacity 0.5s 0.5s ease;
    -webkit-transition: opacity 0.5s 0.5s ease;
    -o-transition: opacity 0.5s 0.5s ease;
    -moz-transition: opacity 0.5s 0.5s ease;
}
.biography:hover  #moreBio {
    opacity: 1;
}
Solution courtesy of: Ryan Mitchell

Discussion

Instead of doing #moreBio:hover you could do .biography:hover #moreBio and then add a delay for the #moreBio transition like so

// ... other code just like it's

#moreBio {
    opacity: 0;
    transition: opacity 0.5s ease;
    -webkit-transition: opacity 0.5s ease;
    -o-transition: opacity 0.5s ease;
    -moz-transition: opacity 0.5s ease;
     -webkit-transition-delay: 0.5s;
    transition-delay: 0.5s;
}
.biography:hover #moreBio {
    opacity: 1;
}

Here is the working sample.

Discussion courtesy of: webNeat

This recipe can be found in it's original form on Stack Over Flow.