Today, tens of thousands of people from around the country will gather in Washington to brave the cold for a cause they believe in.

Some are marching for the first time, and others have been traveling to the nation’s capital since the Roe v. Wade decision in 1973. For the 42nd year, they’ll meet again for the same reason—the sanctity of life.

We’re also celebrating life today, and we hope you will, too. Here are 29 moving reminders of the beauty of life:

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proud sister
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brothers
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proudsiblings
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baby3
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twins
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sister
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All photos courtesy of Thinkstock.