With his new encyclical, Pope Francis added his voice to this chorus of encouragement inviting people not to lose heart.

Explore these fascinating fun facts about the heart for kids! Your heart is not just a ... It’s like your heart is doing a happy dance! The human heart connects to a number of veins and arteries.

If you're a kid, your heart is about the same size as ... During an average lifetime, the human heart will beat more than 2.5 billion times. Give a tennis ball a good, hard squeeze.

It also shows how the pacemaker cells restart her heart after the surgery. This short film is from the BBC series, Inside the Human Body. The 3D footage brings the topic to life and would enhance ...