RT @RonBaalke: On this day in 1967, Venera 4 plunged into Venus’ atmosphere. Probably 1st to successfully land on another planet. https://t.co/ukWfnfx9Bh
RT @RonBaalke: On this day in 1967, Venera 4 plunged into Venus’ atmosphere. Probably 1st to successfully land on another planet. https://t.co/ukWfnfx9Bh