Which is the stronger gender?

Which is the stronger gender?
Personal trainers Brian & Kara Egwuatu working out together
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It's a question that goes back to the beginning of time - who's stronger: men or women?

It's something Brian Egwuatu and his wife Kara battle over all the time, especially at the gym. Both are in great shape but in the end, they both agree they've been brought up to believe that men are the stronger sex.

"Look at men," said Kara. "They're bigger, they're taller, they have more muscle mass."

But now, landmark research being done by Dr. Doris Taylor at the Texas Heart Institute is proving women - from their stem cells to their hearts - have men beat. Badly.

"There's a difference in the underlying structure of every organ, blood vessels, liver, kidney, lungs," Dr. Taylor said.

You can actually see the difference, and even feel it. Take hearts for example. Dr. Taylor took male and female pig hearts - nearly identical to the human heart - then stripped them of all cells so she could look at the basic structure. The female heart was small, compact and toned while the male heart was soft, loose, thin-walled and almost runny.

Then there are the stem cells, the body's super-powered repair system. Research shows women have far more stem cells and they last a lot longer.

Dr. Taylor's goal in all of this was far more pragmatic that answering a philosophical question about which gender is stronger. She wants to harvest those "super-powered stem cells" women have and inject them into both men and women suffering from heart disease, kidney disease, diabetes and more in order to cure them.

"The goal now is to not just make it 10 percent better, but make it 80 percent better and I'm betting on female cells for that," explained Dr. Taylor.

She said all of these differences between male and female hearts and stem cells may also help explain why men die from heart disease so much younger than women.