It looks like the most voracious beasts of the universe, supermassive black holes, may have an upper limit to their appetites. Calculations show that beyond 50 billion solar masses, they go on a permanent hunger strike because their buffet table disappears.
It is encouraging when bureaucrats refuse to cave to the pressure of people’s belief in the paranormal.
UCLA led scientists have transformed magnesium into one of the strongest metals by successfully infusing it with ceramic nanoparticles When you think of load-bearing or structural metals (assuming you do at all) you probably think of aluminum and titanium which are both lightweight and strong and therefore ideal for this task. Not many people are
What you see here is one of the most beautiful phenomena in nature, iridescence.
Iridescence is an optical phenomenon that is also often called thin-film-interference. It is most often seen in the man-made and iconic parking lot puddle. The oil on the water is so thin it reflects light from both its top surface and bottom. That tiny tiny extra distance that the latter light travels before it reflects towards your eyes causes it to be out of phase with the top-reflecting light. As this light interferes with itself, the colors implicit in the white light reveal themselves to glorious effect.
Two research teams each claim they potentially made discoveries of perhaps huge super-earth planets possibly near the edge of our solar system……maybe. If you read that carefully you may get a vague sense that the jury is still out about exactly what the astronomers have detected. This research was recently posted on the (in)famous arXiv
Polymelia is a birth defect in which the affected individual has more than the usual number of limbs.