Retrograde in History · 1908
Tunguska event
On June 30, 1908, Mercury was mid-loop — retrograde in Cancer, tracing backward through 15°06′ of the sign.
WhenJune 30, 1908♋︎Cancer 15°06′Rx windowJun 21 – Jul 16, 1908
The record
On the morning of 30 June 1908, a massive explosion of between 3–50 megatons of TNT equivalent occurred near the Podkamennaya Tunguska River in Yeniseysk Governorate, Russia.
Born inside this same window
Coincidence, not causation: the date is real and ephemeris-based, but a retrograde window is observed, never blamed. For entertainment, not navigation.