The ultimate fate of a star shredded by a black hole

In 2019, astronomers observed the nearest example to date of a star that was shredded, or ‘spaghettified,’ after approaching too close to a massive black hole. That tidal disruption of a sun-like star by a black hole 1 million times more massive than i…

Sperm are masters of DNA packing

During sperm production, an enormous amount of DNA has to be packed into a very small space without breaking anything. A central role is played by certain proteins around which the DNA thread is wrapped — the protamines. A recent study provides new in…