Plague (disease)

Corybantian dance , the type of dance most likely danced on Gymnopedia festivals (image from Smith 's Dictionary of Antiquities ).

In 1974, the Arecibo Observatory was used to send the first known intentional radio message transmission into space

01The 1974 Arecibo Message was aimed at globular cluster M13 — 25,000 light-years away, arrival date roughly 26,974 AD.
02Stephen Hawking publicly warned that contacting aliens could be analogous to Native Americans meeting Columbus — and we know how that ended.
03METI International transmitted 'Sonar' toward GJ 273, a nearby star, in 2017 without any international consensus or oversight body approving it.

Unit 731 maintained plague-flea breeding facilities producing 3 kilograms of fleas per week — roughly 45 million fleas — enough to seed an epidemic across a mid-sized city in a single sortie.