Year: 2022

GENERAL RELATIVITY. “In this theory, gravitation arises from the curvature of spacetime, which makes objects move as if they were pulled by a force. Conversely, the curvature is caused by the presence of matter and energy.” https://lnkd.in/draqjTW View in LinkedIn

TEARING THE FABRIC. “According to Einstein's equations, a sufficiently dense concentration of matter or energy will curve spacetime so extremely that it rends, forming a black hole.” https://lnkd.in/draqjTW View in LinkedIn

EVENT HORIZON. “The laws of relativity forbid anything that went into a black hole from coming out again, at least within the classical (nonquantum) description of the physics. The point of no return, called the event horizon of the black hole, is of crucial importance. In the simplest case, the horizon is a sphere, whose surface area is larger for more massive black holes.” https://lnkd.in/draqjTW View in LinkedIn

FORENSIC EVIDENCE. “It is impossible to determine what is inside a black hole. No detailed information can emerge across the horizon and escape into the outside world. In disappearing forever into a black hole, however, a piece of matter does leave some traces.” (Soft hair). https://lnkd.in/draqjTW View in LinkedIn

FALLING INTO THE BLACK HOLE. “Its energy (we count any mass as energy in accordance with Einstein's E = mc2) is permanently reflected in an increment in the black hole's mass.” https://lnkd.in/draqjTW View in LinkedIn

THE NEW WORLD. “Space is different for different observers, time is different for different observers; spacetime is the same for all observers.” (The physicist, John Wheeler) https://lnkd.in/dJ6fFGM View in LinkedIn

A french cheese, rotten to the core, stinky as it gets, is one of humanity’s finest creations. View in LinkedIn

FRAGMENT FROM NATURE features for this and next weekend an excellent article titled “Enzymatic Adaptation and the Entrance of Molecular Biology into Embryology” by Scott F. Gilbert. It describes the acute rivalries between embryologists and geneticists as the two disciplines came to overlap, and is a testament to the resistance of science to new ideas based on turf and the ideology of reductionism versus holism. https://lnkd.in/dQuxg6Y View in LinkedIn

TWO DISCIPLINES. “By the 1930s, genetics and embryology had their own rules of evidence, their own paradigmatic experiments, their own favored organisms, their own professors, their own journals, and most importantly, their own vocabulary. Since then, genetics has become explained in terms of molecular biology, and embryology has become developmental biology.” https://lnkd.in/dQuxg6Y View in LinkedIn

THE DIVIDE. “The geneticists of the 1930s and the molecular biologists of the 1980s tend to be reductionists.” https://lnkd.in/dQuxg6Y View in LinkedIn