1 Table of Contents: “...The Nature of Comets -- Comet Nucleus: Some Characteristics and a Hypothesis on Origin...”

2 Table of Contents: “... America since Late Miocene to the Recent -- Objectives and hypothesis -- Methods -- Stratigraphic...”

3 Table of Contents: “... - An Alternative Hypothesis on the Origin and Evolution of the Mitotic Spindle -- The Fifth Base: A Natural Feature...”

4 “... earth" hypothesis that accounts for signs of glaciation in Neoproterozoic tropics. He develops...”

5 “... values cover closed woodlands to C4 grasslands. This plasticity agrees with the hypothesis...”

6 “... of this new phylogenetic hypothesis...”

7 Table of Contents: “... of Eden? -- Evaluating the Mitten-Gliding Hypothesis for Paromomyidae and Micromomyidae (Mammalia...”