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A New Study Appears to Stunningly Contradict Newton and Einstein's Theory of Gravity

https://www.popularmechanics.com/space/deep-space/a44776417/study-contradicts-newton-einstein-theory-gravity/

 

"But space is a big place, and even Einsteins sometimes meet their limit. One of the most well-known of these limits is a black hole’s center, or singularity, where Einstein’s famous theory appears to break down completely. Now, a new study from scientists at South Korea’s Sejong University suggests that another limit to Newton and Einstein’s conception of gravity can be found in the orbital motions of long-period, widely separated, binary stars—also known simply as “wide binaries.” The results of this study were published this month in The Astrophysical Journal."

 

 

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The Secret Reason Why Ancient Roman Concrete Is So Remarkably Strong

Roman concrete can self-heal cracks before they spread. An expert tells us the chemistry behind it.

https://www.popularmechanics.com/science/archaeology/a42555277/why-ancient-roman-concrete-is-so-strong/

 

"In other words, these small lime-clast chunks can react with water, post-mixing, to recrystallize as calcium carbonate, and fill cracks while reacting with the ash for further strength. The reactions take place spontaneously, self-healing the cracks _before_ they spread."

 

Action movies involving cracks in dams will never be the same.

 

 

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