Why can't we see Planet Nine. Why is it hiding? The latest idea is that it is invisible. A black hole lurking in the outer reaches of our solar system. This one is a primeval black hole - and one of those missing black holes (small to medium). The new study is on the arxiv pre printer server - see https://phys.org/news/2019-09-planet-primodial-black-hole.html ... and https://arxiv.org/abs/1909.11090

William sent in this link to https://phys.org/news/2019-10-hypothesis-asteroid-contributed-mass-extin... ... another discovery on the Younger Dryas impact theory. This time at Wunderdratar in the Limpopo province of South Africa. The research was published in Palaeontoliga Africanus by a team led by the University of Witwatersrand's Francis Thackeray. What they found was a platinum spike north of Pretoria. The evidence comes from a core drilled in a peat deposit, within a sample dated 12,800 years ago.

A 'Steve Storm' struck Scandinavia on 28th September rather than the expected auroral outbreak - see https://spaceweather.com (October 2nd 2019) ...

   ... a mauve ribbon of light caused by gas flaring through Earth's magnetosphere at high speed (plasma it would seem). At the same site, on Oct 1st, we had a story about a green flash on Venus ...

At https://archaeologynewsnetwork.blogspot.com/2019/10/ancient-genomes-prov... ... a team has hanalysed plague victims from the UK, France, Germany, Russia, and Switzerland in order to gain more info on the secondary outbreaks - from the 14th to 18th centuries AD. The Black Death itself occurred in mid 14th century and appears to display evidence of a single strain of the virus, However, there was subsequently a host of later outbreaks of the plague, some of them quite devastating.