Happy Birthday Carl Sagan!

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Today marks the 77th birthday of the late scientist and author, Carl Sagan. A lot of us probably owe much of our understanding of space and astrophysics to this man. Thanks, Carl. Happy Birthday!

Happy Birthday, George Takei!

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George Takei turns 75 years old today. Beginning his career at a time when Asian characters on televison were extremely rare, he started out with small one-off roles in a few popular TV shows. As we all know, he eventually landed the role of Hikaru Sulu and was responsible for the character's swashbuckling fantasies that led to the scene pictured above. Outside of "Star Trek," he is an accomplished actor and activist, working for gay rights, Japanese American rights, and even getting "Star Trek" and "Star Wars" fans to stop bickering and focus on a common enemy. Clearly, it's not just okay to be Takei, it's pretty awesome.

He is also incredibly active on the internet, and there is a chance he's reading this right now. If you are George, we just want to say thanks for everything you've done, both on and off screen, and happy birthday!

The Doctor's 30th Birthday Cake

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Matt Smith turns 30 this Sunday! Here he is receiving a TARDIS-shaped birthday cake at MCM London Expo. Happy Birthday, Matt!

Happy Birthday, Karen Gillan!

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Karen Gillan, who plays Amy Pond on "Doctor Who," is 24 years old today. Happy birthday, Pond!

Happy Birthday, David Tennant!

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David Tennant turns 41 today. Yes, he's 41 years old and still looks that damn good. He's Barty Crouch Jr., Cassanova, a phenomenal Hamlet, and of course, one of our favorite Doctors. He's also a huge fan of "Doctor Who", and credits the show for getting him interested in acting in the first place. All we can say is Happy Birthday, and thanks for making seasons two, three, and four so much fun to watch.

Happy birthday, David Tennant!

Happy Birthday, Stan Lee!

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Stan Lee, co-creator of Spider-Man, the Fantastic Four, the X-Men and more, turned 89 years old today. Lee first broke into comics in 1939 after graduating high school at age 16. His uncle helped him become an assistant at Timely Comics, which would later become Marvel. His first writing to appear in a comic book was a text filler page in "Captain America" issue #3. Since then he has helped create numerous beloved characters, helped reform the Comics Code, and challenged conventional ideas of what a superhero could be. Happy birthday, Stan. Excelsior!

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