twisted by the sisters
Two black holes merged as they fly in almost different directions, suggesting that they were born in different places and found each other late in life; James R. Riordan reported in “A new type of black hole merger discovered” (SN: 8/27/22, p. 13).
Reader Van Snyder one wonders if the cause of the black holes flying in almost opposite directions is that some collision provided a flipped parent star of one of the black holes.
It is possible, although highly unlikely, that one of the black holes collapsed as a result of the previous event. Riordan he says But even then that collision probably wouldn’t have happened.
Before a dying star explodes into a supernova to form a black hole, it ejects matter. The forces of those ejections could “kick” the dying star, putting it on tilt. That tilt remains even as the star forms a black hole. And the bigger the star, the harder it is to kick. Star that it is It would probably have been difficult for the kick to develop a sufficiently heavy weight, to be able to be knocked too far from its companion star, so that it would again be easily confused as a black hole; Riordan he says
Since in studies black holes are in such completely different parts, one inverted with respect to the other – it is unlikely that two black holes arise and are thrown out of sync by such a kick; Riordan he says
What’s more, black holes are incredibly large. “The lighter of the two is probably about three times the mass of the sun.” Riordan he says “Flipping over it won’t be impossible, but it would be difficult to do while leaving enough black holes to connect when they did.”
Get to the earful
The inner ear canals of mammalian ancestors shrank abruptly about 233 million years ago, suggesting that the animals became warm around that time. A shift in the structure of the ears can be compensated by thinning inner ear fluid, as the body temperature rises; Carolyn Gramling reported in “Triassic fermentation idol to” (SN: 8/27/22, p. 9).
Reader Van Snyder The question is when did the fermentation of blood or endothermy arise in theropods, the ancestors of modern birds. Could looking into the ears of birds also provide clues to that period of evolution?
There is much debate among researchers about when endothermy developed in birds, says the paleontologist Stephen Brusatte of the University of Edinburgh.
Some scientists argue that a fast metabolism, which is linked to the fermentation of the blood, developed early in the history of birds; Brusatte he says “Others argue that there are even more Mesozoic birds.” [from around 252 million to 66 million years ago] he did not have the modern avian metabolism, “and, he says, it evolved into full endothermy late in the history of birds.”
Rather than small, tightly curved inner ear canals, birds and their ancestors followed a different path of evolution that evolved rather than responding to blood pressure, says the vertebrate paleontologist. Richard Araújo University of Lisbon in Lusitania.
Previous studies that looked at the fluid of the inner ear of pigeons, or endolymph, suggest that the endolymph of birds is much thicker than that of any other tetrapod, a vertebrate having four limbs or having evolved from a quadrupedal ancestor; Araújo he says “Although more or less primitive” [inner ear] they changed the morphology and chemistry of the endolymph to restore the increased body temperature,” he speculates.
#Readers #learn #type #black #hole #merger #blood #boiling #Science #News