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Best-Laid Plans

Launched in November 1981, the Soviet Union’s Venera 14 probe carried a spring-loaded arm to test the soil of Venus.

The craft journeyed for four lonely months to reach its destination, descended safely through the hostile atmosphere, and landed securely on the surface.

The spring-loaded arm plunged downward — into a camera lens cap, which had just fallen there.

(Thanks, Merv.)