1) Ape man 2) Art letter 3) Combination puzzle 4) Elusive evolutionary claim 5) EP by Australian artist 6) Evolutionary chain mystery 7) Evolutionary mystery 8) Gap in a series 1) Staring contest edge 
[puzzle] Missing Link is a mechanical puzzle invented in 1981 by Steven P. Hanson and Jeffrey D. Breslow. The puzzle has four sides, each depicting a chain of a different color. Each side contains four tiles, except one which contains three tiles and a gap. The top and bottom rows can be rotated, and tiles can slide up or down into the gap....
hypothetical extinct creature halfway in the evolutionary line between modern human beings and their anthropoid progenitors. In the latter half of ... [2 related articles]
[n] - hypothetical organism formerly thought to be intermediate between apes and human beings
ape-man noun hypothetical organism formerly thought to be intermediate between apes and human beings