Do the Pioneer plaques do a good job of explaining humans to extraterrestrials?

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The Pioneer plaques are a pair of gold-anodized aluminum plaques that were placed on board the 1972 Pioneer 10 and 1973 Pioneer 11 spacecraft, featuring a pictorial message, in case either Pioneer 10 or 11 is intercepted by intelligent extraterrestrial life.

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At the top left of the plaque is a schematic representation of the hyperfine transition of hydrogen, which is the most abundant element in the universe.

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On the right side of the plaque, a nude man and woman are shown in front of the spacecraft.[6] Between the brackets that indicate the height of the woman, the binary representation of the number 8 can be seen (1000). In units of the wavelength of the hyperfine transition of hydrogen this means 8 × 21 cm = 168 centimetres (66 in).

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The woman's genitals are not depicted in detail; only the Mons pubis is shown. It has been claimed that Sagan, having little time to complete the plaque, suspected that NASA would have rejected a more intricate drawing and therefore made a compromise just to be safe.[8] Sagan said that the decision to not include the vertical line on the woman's genitalia (pudendal cleft) which would be caused by the intersection of the labia majora was due to two reasons...Second, Sagan believed that a design with such an explicit depiction of a woman's genitalia would be considered too obscene to be approved by NASA.

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At the bottom of the plaque is a schematic diagram of the Solar System. A small picture of the spacecraft is shown, and the trajectory shows its way past Jupiter and out of the Solar System.

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