Jose Canseco explains gravity on Twitter

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Jose Canseco, the former MLB outfielder who penned a tell-all book about steroid use in baseball, has become an avid social media user in his retirement, tackling everything from North Korean missile tests to lady popes.

Now, the 48-year-old has graced the Internet with his highly scientific thoughts on gravity, "ancient gravity," 30-foot leather birds and the nimbleness of dinosaurs.

Canseco somehow segued from music to gravity Sunday night, promising Twitter followers a forthcoming physics lesson.

Then you will love umphrey's McGee.I will be at their show at the house of blues in vegas on march 21st.#umphreak

— Jose Canseco (@JoseCanseco) February 18, 2013

More thoughts on gravity tomorrow

— Jose Canseco (@JoseCanseco) February 18, 2013

Ancient gravity was much weaker

— Jose Canseco (@JoseCanseco) February 19, 2013

You ever wonder why nothing REALLY big exists today in nature

— Jose Canseco (@JoseCanseco) February 19, 2013

elephants today eight tons supersaurs two hundred tons a totally different world. why?

— Jose Canseco (@JoseCanseco) February 19, 2013

Animal tissue of muscles and ligaments could not support huge dinosaurs even standing up or pump blood up 60 foot necks

— Jose Canseco (@JoseCanseco) February 19, 2013

Gravity had to be weaker to make dinosaurs nimble

— Jose Canseco (@JoseCanseco) February 19, 2013

My theory is the core of the planet shifted when single continent formed to keep us in a balanced spin

— Jose Canseco (@JoseCanseco) February 19, 2013

The land was farther away from the core and had much less gravity so bigness could develop and dominate

— Jose Canseco (@JoseCanseco) February 19, 2013

I may not be 100% right but think about it.How else could 30 foot leather birds fly?

— Jose Canseco (@JoseCanseco) February 19, 2013