Hayakawa et al. 2019, The earliest candidates of auroral observations in Assyrian astrological reports, ApJ Letters
How it connects
This book or paper is where we read about
Red glow in Assyrian astrological reports, about 679 to 655 BC
One item, everything we know about it, and everything it is connected to.
Words we use: Mystery A question nobody has answered yet. Clue from people Something people wrote down or told long ago: a chronicle, a diary, a story, a carving. Clue from nature Something nature recorded by itself: tree rings, ice, rock layers, or the leftovers of an exploded star. Hunch Our guess that a clue from people and a clue from nature are about the same event. Book or paper Where we read it, so anyone can check our work. Step Something we did, in the order we did it.