Women make up almost half of the US workforce but earn 79 cents for every dollar a man makes. Many people have heard this statistic at one time or another.

And it is factually correct — but these figures don't tell you how the wage gap varies across industries or what could be done to fix it.

If you look at how the wage gap varies by women's ages and by the fields they work in, one fact becomes clear: Inflexible work hours tend to disadvantage women. They're also often unnecessary.

Check out the video above and read Sarah Kliff's article to learn more.