This week, the Milky Way may not collide with Andromeda in 5 billion years after all, two of the world’s only freshwater porpoise species have been returned to the wild for the first time in China, and, in the first-ever evidence of the environment affecting mammalian sex determination, male mice embryos have developed ovaries due to changes in iron levels. Finally, we ask why it’s so damn hard to tell the sex of a dinosaur .
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Gaia18cdj: The Biggest Explosion Event Since The Big Bang Seen By Astronomers
Astronomers using data from NASA, the European Space Agency (ESA), and other observatories around the world have discovered the most energetic explosion