There are several hyphenation issues.

• "inter-glacial" and "Interglacial" are both used; you need to pick one way and be consistent with it -- either always hyphenate it or never hyphenate it.
• "ice age" and "ice-age" are both used, but the correct phrasing is always "ice age".
• I had to look this up to be sure, but "nano-tech" should not be hyphenated. It should always be spelled as "nanotech" or "nanotechnology". Part 4, Chapter 1 (Tables Turning) also uses "nano-tech" and should be fixed accordingly as well.