Check out our featured song: Combustion by Helga Arvesten! https://youtu.be/GrEAtvUNJ3E

Theres a science to The Big Bang Theory moments that made us happy cry. Our countdown includes Sheldon tells Amy he loves her, Raj talks to Penny sober, Howard finds out Bernadette is pregnant, and more! Which Big Bang Theory moment made YOU happy cry? Let us know in the comments!

Watch more great The Big Bang Theory videos here:
Top 20 Most Memorable Big Bang Theory Cameos - https://youtu.be/2MNrJYB-8dY
10 Times Penny Was the Best Character on The Big Bang Theory - https://youtu.be/quzu-Bb6q4w
Top 10 Penny & Leonard Moments on The Big Bang Theory - https://youtu.be/c6y5uu7jEhQ

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