Anomalous ‘light’ black holes are primordial in the Universe
Black holes are formed either by the collapse of a massive star or by the merger of heavy objects. However, scientists suspect that smaller “primordial” black holes, including some with masses similar to the Earth, may have formed in the chaotic early moments of the universe. When we think of black holes, we tend to picture enormous cosmic monsters, such as stellar-mass black holes with masses tens or hundreds of times that of the Sun. We can even imagine supermassive black holes, with masses millions (or even billions) of times that of the Sun, sitting at the hearts of galaxies and dominating their surroundings. A team of scientists has predicted that NASA’s Nancy Grace Roman Space Telescope could detect a class of “light” black holes that have eluded detection until now.
Global warming leads to a change in the speed of rotation of the Earth and a change in the length of the day
The melting of polar ice leads to a change in the planet’s rotation speed, which in turn affects the global calculation of time, a study from the University of California showed, reports the scientific journal Nature. Geophysicists from the University of California have found evidence that the slowing rotation of the Earth’s core, combined with the melting of the Antarctic and Greenland glaciers, will lead to the fact that in 2029, humanity will have to shorten, rather than increase, the length of the day for the first time.