Language

The hyoid bone: the only floating bone in front of the larynx; enables precise control over the larynx and tongue for articulated speech; not connected to other bones like the rest of the skeleton.
Neanderthals: had the hyoid bone, but throat/skull shape and nasal cavity affected voice; likely sounded quite different from modern humans.

Language emerged as a cognitive and social ability between 100\% and 135{,}000\% years ago? (Note: the timeline is given qualitatively as a range; physical ability to articulate came first, vocabulary later.)
Early language likely started as basic vocalizations (grunts, tones); vocabulary and grammar developed over thousands of years.
There is no known single first language; the hyoid and vocal control are common to all humans.

Articulation depends on precise control of the larynx, tongue, and related anatomy; primitive primates lack this precision.
Vocal anatomy (e.g., hyoid) was a prerequisite; cognition allowed complex language to develop later.

Language family: group of languages descended from a common ancestral language; like a family tree with mother/daughter languages.
There are over 7{,}000 languages today, but about 90\% may disappear within roughly 10 years; languages are dying out at a rapid pace.
13 major language families account for most languages; the “largest by derivatives” is Niger-Congo.

Niger-Congo: greatest number of daughter languages; ~22\% of all languages; concentrated in Sub-Saharan Africa (e.g., Swahili, Yoruba, Igbo, Fula).
Austronesian: spread across the South Pacific and Indian Ocean; Malagasy origin in Madagascar; ancient maritime spread to Indonesia, the Philippines, Taiwan, New Guinea, New Zealand, Hawaii.
Trans-New Guinea: centered in New Guinea (Papua New Guinea and parts of Indonesia); extremely linguistically diverse; includes many languages; some theories propose linguistic isolates in the region; origin in the Central Highlands around 8{,}000 years ago.
Sino-Tibetan: includes Chinese languages (Mandarin, Cantonese) and Tibetan, Burmese; covers China, the Tibetan Plateau, the Himalayas, Myanmar, Thailand; >1{,}000{,}000{,}000 speakers of Chinese languages alone.
Indo-European: Europe, the Iranian Plateau, Northern Indian Subcontinent; includes English, Spanish, French, Russian, German, Hindi, Bengali, Portuguese, etc.; ~3{,}000{,}000{,}000 speakers; widest spoken family.

English is part of Indo-European; connections exist between modern English and ancient Sanskrit, showing deep ancestry across language families.
All languages trace back to earlier sources; languages are related at deep time depths.

The Niger-Congo family dominates the Sub-Saharan African region; many languages in this area.
Madagascar and Malagasy illustrate long-distance linguistic links: Malagasy is related to other Austronesian languages, reflecting ancient maritime contacts.
Sub-Saharan Africa is the cradle of modern humans (Homo sapiens) and hosts the greatest genetic and linguistic diversity on the planet.

Evidence points to Homo sapiens origins in Africa about 300{,}000 years ago; oldest human fossils found in Africa.
Africa contains the greatest genetic diversity and the greatest linguistic diversity (especially within Niger-Congo).
Early migration path: Sub-Saharan Africa → North Africa → rest of the world.
Regions of interest: Rift Valley; Blombos Cave in South Africa; these areas are highlighted in investigations of human origins and early cultures.

Mitochondrial Eve: a theoretical common matrilineal ancestor for all modern humans; evidence exists but interpretation is debated.
A short video on the topic is referenced; guiding questions include:
- How does the mitochondrial Eve theory challenge preconceived notions of Africa?
- What is the evidence for mitochondrial Eve, and who was she according to that evidence?
- What was life like in Africa at the time of mitochondrial Eve?
- What might that imply for our understanding of human origins?