Mount Sinai Launches Lab-Grown Mini Hearts and Brains… - inkl

The heart is, inarguably, one of the most important organs in the body. It sits in your chest, carefully armored by sternum and ribs, constantly pulsing to maintain the flow of blood, transporting oxygen, nutrients, and other essential substances to every extremity of your body. It might be reasonable to think that there's an indelible link between the heart and the body it resides in – the processes that affect one inevitably affect the other. But a new preprint, uploaded to bioRxiv and yet to be peer-reviewed, suggests that this may only be true up to a point. Take the heart out of the body and put it in a new one, and something incredible happens. The transplanted heart begins to take on the biological age of its new owner. Older hearts transplanted into younger recipients appear to become biologically younger, while younger hearts placed in older bodies show signs of accelerated aging. That's the fascinating finding of a study led by molecular biologist Jesse Poganik of Harvard Medical School, suggesting that an organ's biological age isn't entirely intrinsic to the organ itself, but is strongly influenced by the body around it.

Lawrence Livermore National Laboratory researcher Isaiah Santistevan led the development of three-dimensional simulations exploring how a nuclear device could deflect or disrupt an asteroid threatening Earth. Credit: Blaise Douros/LLNL Lawrence Livermore National Laboratory (LLNL) researchers are developing three-dimensional simulations to examine how a nuclear device could be used to deflect or potentially disrupt an asteroid threatening Earth.