Pre-Historic

• Northern Hemisphere grasslands expansion.

• Cooling and drying global climate

• Marine Mammals: whales, seals, sea cows.

• Non-mammals persist: crocodiles and sharks

• First gorillas: Great apes evolved in Africa.

• Earliest homonins (Sahelanthropus, Orrorin): ~7–6 MYA → Exclusively African; might have walked on two legs.

Indian Plate (sutured):

• Diverse elephants and other close relatives: ~23 MYA → well documented from this time across Indian subcontinent.

• Miocene great apes (e.g., Sivapithecus) present in Siwalik Hills of India-Pakistan region.

• Homonins: No fossil evidence;

Communication (inferred, debatable):

• Hominins (~6 MYA): Gestures, calls, signals; No grammar, no symbolic words.

• Global cooling and drying continue

• Grasslands and savanna ecosystems expand

• Early hominins diversify in Africa

• Ardipithecus (proto-human): ~5.3 MYA → early hominin with mixed ape–human traits

• Australopithecines: ~4 MYA → mostly walked on two legs

• Australopithecus afarensis (early hominin): ~3.2 MYA → Lucy Female Specimen in East Africa

• Paranthropus: ~2.7 MYA → robust hominin lineage  with massive jaws (extinct ~1 MYA)

Indian Plate (sutured):

• Strong seasonal monsoon climates dominate

• Grassland expansion

• Rich mammalian fauna: Elephants (Stegodon), bovids, deer, rhinos, large carnivores; monkeys and non-hominin primates.

• Homonins: No fossil evidence during this time

Important Note on Indian Plate: 

• The Neogene fossil record in India is real and robust, demonstrating that conditions conducive to fossil preservation existed throughout much of the Neogene. 

• From the late Neogene (continuing into the Pleistocene Epoch), intensification of the monsoon system—combined with ongoing tectonic activity—made much of the Indian Plate increasingly hostile to fossil preservation. 

• Intense seasonal erosion, acidic soils in many regions, a relatively lesser number of caves (where fossils are often found), and rapid sediment recycling reduced the formation and long-term exposure of stable fossil-bearing basins. 

• As a result of the above, Early Pleistocene fossil deposits are rare in India. 

• Multiple hominin species coexisted (non-linear evolution)

• Homo habilis: ~2.4–1.4 MYA → East & South Africa

• Earliest technology: Oldowan stone tools appear

• Possbile scavenging and opportunistic hunting.

• East Africa: ~2.0–1.9 MYA → Earliest Homo erectus–grade fossils, often classified as Homo ergaster.

• Western Asia: ~1.85–1.78 MYA → oldest secure hominin fossils outside Africa (Dmanisi, Georgia).

• East Asia (China): ~1.6–1.2 MYA → Homo erectus fossils.

• Southeast Asia (Java, Indonesia): ~1.6–1.0 MYA → classic Homo erectus fossils.

Indian Plate (sutured):

• Stone tools: ~1.8–1.5 MYA → documented in South Asia

• No hominin fossils from this interval are known.

The Migration Theory:

• Based on the geographic and chronological distribution of Homo erectus–grade fossils—from East Africa to western and eastern Eurasia—it is inferred that erectus-grade hominins migrated out of Africa. 

• This theory is based on fossil ages, morphology, and other relevant factors rather than direct observation. While new discoveries could modify this model and alternative scenarios could arise, this is the most parsimonious explanation given current evidence.

Communication (inferred, debatable):

• Early proto-speech (Homo erectus): ~2.0 MYA → 

  • Better breath control, changes in vocal tract; 

  • larger, more organized brains; 

  • coordinated hunting and long-distance migration.

  • Likely abilities: intentional vocal signals, repeated sound–meaning pairings; maybe simple “labels” for things or actions. 

  • Still: no grammar, no clear syntax.

• Control of Fire: ~800–400 kya (date debated)

Indian Plate (sutured):

• Possible fire use: Inferred from archaeological contexts, though evidence is limited and debated.

• Found in Africa, Europe, possibly western Asia

• Likely ancestor of Neanderthals and Homo sapiens

Indian Plate (sutured):

• No confirmed H. heidelbergensis fossils.

• Regional populations likely derived from H. erectus.

Communication (inferred, debatable):

• Homo heidelbergensis: ~600 kya → 

  • Evidence: Near-modern hyoid bone, brain regions for language well-developed, complex tools, planning, teaching. 

  • Likely abilities: symbolic words, small vocabularies, flexible word order, heavy reliance on context and gesture.

• Simple shelters: ~400–300 kya → Chichibu, Japan

• Wooden spears: ~400–300 kya → Schöningen, Europe; show active big-game hunting

Indian Plate (sutured):

• Stone tool traditions continue: hunting-gathering lifeways  seems to be well established.

• Oldest Homo Sapien fossils: ~315 kya → Jebel Irhoud, Morocco 

Indian Plate (sutured):

• Stone tools present; can’t securely attribute to Homo sapiens. 

• No modern human fossils are known.

Communication (inferred, debatable):

• Homo sapiens: ~315 kya → Anatomical capacity for speech (vocal tract, brain). 

• Homo sapiens: ~315 kya to 200 kya → 

  • Likely abilities: Grammar, tense, questions, negation, storytelling, and teaching abstract ideas. 

  • This lines up with: symbolic burials, art, long-distance trade, social myths, and identity

• Neanderthals or Homo Neanderthalensis: 

  • Widespread in Europe and western Eurasia; 

  • Adapted to cold climates, 

  • Extinct around 40 kya.

• Note: Homo sapiens originated earlier in Africa, while Neanderthals evolved later in Europe; both coexisted long before modern humans spread widely across Eurasia.

Indian Plate (sutured):

• No documented Neanderthal fossils in South Asia.

• Other archaic Homo populations likely occupied the region, though skeletal evidence is sparse.

• Crude spoken language emerges, beyond signals & cues. 

• Increasing evidence for symbolic cognition (partly inferred)

Communication (inferred, debatable):

• Languages: They didn’t appear overnight. Language evolved gradually from ~150 kya onwards.

• First evidence “trade”—shells, pigments, stone materials transported and exchanged over long distances

• Earliest beads and personal ornaments: ~100–75 kya

• Toba Volcanic Eruption

• Massive volcanic eruption in Indonesia

• Genetic bottleneck hypothesis (debated): 

  • Recent evidence has “largely discredited” the catastrophic bottleneck theory. 

  • Archaeological and genetic evidence show human populations survived relatively well.

Indian Plate (sutured):

• Ash from Toba was widely deposited across India

• But human populations might have survived even regionally. 

• Possibly negates any chances of the complete erasure of Indian fossils. 

• Cultural and technological acceleration

• Complex blades, art, clothing, ritual behavior

• Expanded plant and resource processing

Indian Plate (sutured):

• Homo sapiens: ~65–50 kya → firmly established; rich archaeological record of modern behavior.

Communication (inferred, debatable):

• Complex Speech: Not better biology—better use of language and powerful preservation of history.

• Oldest well-known cave art (e.g., Chauvet, France)

Indian Plate (sutured):

• Rock art traditions develop later; evidence for symbolic expression present in Late Pleistocene contexts.

• Part of the ongoing Quaternary Ice Age. 

• Period of lower global temperatures and sea levels.

• Many megafaunal extinctions occurred ~50–10 kya.

• Last Glacial Maximum: ~21 kya → Coldest phase

Indian Plate (sutured):

• Climate was colder and drier.

• Weakened monsoon and lower sea levels.

• Deglaciation begins: ~19 kya → 

  • Ice sheets start retreating; 

    • global temperatures rise; 

    • sea level begins long-term rise

• Meltwater Pulse 1A: ~14.6 kya → 

  • rapid global sea-level rise causing major coastal reorganization

• Younger Dryas begins: ~12.9 kya → 

  • Sudden return to near-glacial cold conditions; 

  • weakened Atlantic circulation; 

  • ends abruptly at 11.7 kya

Indian Plate (sutured):

• Significant climate and sea level effects 

• Rise in sea-level causing reshaping of western and eastern Indian coastlines.