| RISS | Third of the four major Alpine glacial periods of the Pleistocene epoch, between the Gunz and Mindel and the Wurm (1,1,1,1) |
| MIOCENE | Epoch between the Oligocene and Pliocene (7) |
| TARIQ | "Deja Vu (Uptown Baby)" rappers Lord ___ & Peter Gunz |
| ICEAGE | Glacial period of history (3,3) |
| ICEAGES | Glacial periods in the Earth's history (3,4) |
| SECOND | Unit of time defined as "the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium-133 atom" (6) |
| SMILODONS | Members of an extinct genus of short-limbed sabre-toothed tigers of the Pleistocene epoch (9) |
| FRONTAL | - lobe; functioning as a type of anatomical control panel responsible for many of our important cognitive skills, one of the four major lobes of the cerebral cortex in the brain (7) |
| MAMMOTH | Large extinct elephant of the Pleistocene epoch, typically having a brown hairy coat and long up-curved tusks (7) |
| IRISHELK | Extinct Eurasian deer of the Pleistocene epoch with antlers up to four metres across; Megaloceros giganteus (5,3) |
| SUDRAS | Members of the lowest of the four major Hindu castes of traditional Indian society |
| NEANDERTHAL | A member of a group of archaic humans who emerged at least 200,000 years ago during the Pleistocene Epoch and were replaced or assimilated by modern humans between 35,000 and perhaps 24,000 years ago. |
| MAMMOTHS | Extinct elephants of the Pleistocene epoch (8) |
| TERTIARY | Old term for the period of geological time that constituted the Paleogene and the Neogene periods of the Cenozoic Era (8) |
| OCCIPITAL | One of the four major lobes of the cerebral cortex (9) |
| NATHAN | Third of the four sons of Old Testatement king David and his wife Bathsheba (1 Chronicles 3:5) (6) |
| HOLOCENE | Geological epoch running from the end of the Pleistocene to the present day (8) |
| CASTE | Amy of the four major hereditary classes into which Hindu society is divided (5) |
| CRETACEOUS | The last of the three periods of the Mesozoic Era. It began 145.0 million years ago and ended 66 million years ago. |
| REGENCY | Periods of the Madness of King George when the Prince of Wales took over (7) |
