PubHawk
June 1998 PMID 9650103

Late Pleistocene human population bottlenecks, volcanic winter, and differentiation of modern humans.

S H Ambrose

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Mentions

28
Peak: 4 in Aug 2022
across 5 sources since Nov 2011

Extended reach

320,343
potential audience

Total likes

9,938

Video views

228,180

Mentions per month

Nov 2011 – Jun 2025

Where it's discussed

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AI synopsis

What people are saying

The group's conversations include specific mentions of the significance of volcanic winter and population bottlenecks, exemplified by posts referencing the Toba eruption and its effects on human evolution, as well as debates about the implications of genetic diversity in African populations. The tone varies from scientific curiosity to skepticism, reflecting moderate engagement and perceived impact.

AgreementModerate agreement

Most discussions acknowledge the significance of the research, with some expressing curiosity or tentative support, indicated by phrases like 'fascinating' or reference to the importance of population bottlenecks.

InterestModerate interest

The discussions show moderate interest, with individuals engaging in conversations about how climate change and volcanic events affected human evolution, but some posts are more dismissive or tangential.

EngagementModerate engagement

Participants actively reference specific studies and theories, such as the impact of the Toba eruption and genetic diversity, suggesting a decent depth of engagement.

ImpactModerate impact

The dialogue reflects an understanding that this research could influence interpretations of human origins, though some posts question the certainty or implications, indicating a recognition of its importance.

Abstract in brief

  • The article discusses two main ideas about early human history: one suggests that modern humans spread from Africa around 100,000 years ago, went through population bottlenecks, and then rapidly grew in numbers, especially after developing advanced stone tools in Africa; the other proposes that a massive volcanic eruption from Toba around 71,700 years ago caused a severe volcanic winter, drastically reducing human populations globally and leading to rapid genetic differentiation, particularly in isolated tropical refugia like Africa.
  • The evidence indicates that climate change, particularly during the last glacial period, possibly triggered these bottlenecks and population recoveries, with the biggest populations surviving in tropical regions; notably, the high genetic diversity seen in modern Africans may be due to a less severe bottleneck rather than earlier population expansion.
  • If Toba's eruption was responsible for these population bottlenecks, then the emergence of distinct human races could have happened suddenly only about 70,000 years ago, driven by rapid genetic divergence caused by volcanic winter effects, founder effects, and local adaptations.
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Top posts

Most liked on X and Bluesky
David Ullrich
@DavidUllrich202 · X

Late Pleistocene human population bottlenecks, volcanic winter, and differentiation of modern humans https://t.co/H6FNw6zwz8 https://t.co/dX2gJFGj0U Effective modern human population size through the late Quaternary. Revision of Haigh & Maynard Smith’s estimates of effective https://t.co/r4UUiewoyJ

Jun 28, 2025 · 2 likes · 1 share · 41,480 followers View post →
Lee Scott-Virtue
@Leevirtue · X

Mount Toba : Late Pleistocene human population bottlenecks, volcanic winter, and differentiation of modern humans https://t.co/i6GhBBBhyX #BradshawFoundation #BradshawFND via @BradshawFND

Mar 20, 2019 · 1 like · 4,478 followers View post →
David Ullrich
@DavidUllrich202 · X

RT @DavidUllrich202: Late Pleistocene human population bottlenecks, volcanic winter, and differentiation of modern humans https://t.co/H6F…

Jun 30, 2025 · 1 share · 41,480 followers View post →
Ishrāq
@Ishraqiyyun · X

[2/3] “Atlantis” “Governments want to back off the whole arrangement but it has become difficult because the ‘Draco’ and ‘Reptilian Aliens’ have infiltrated the ‘Elite’.” Late Pleistocene human population bottlenecks, volcanic winter, and differentiation of modern humans: https://t.co/5dVOOFohCA https://t.co/Qj7GvPVwzc

Jun 27, 2024 · 1,980 followers View post →
Z Валерий Гамзатов
@wgamzatov · X

➡️А самый существенный был под 900 тыс лет назад. https://t.co/Q5ZV6KbsFE➡️

Aug 11, 2022 · 1,926 followers View post →
Total clearance
@Total_clearance · X

@LudumRu Кстати, по поводу "бутылочного горлышка" афигенный доклад сделала антрополог Елена Сударикова. https://t.co/SndcDRPviC

Sep 4, 2023 · 437 followers View post →

All mentions

David Ullrich
@DavidUllrich202 · X

RT @DavidUllrich202: Late Pleistocene human population bottlenecks, volcanic winter, and differentiation of modern humans https://t.co/H6F…

Jun 30, 2025 · 1 share · 41,480 followers View post →
David Ullrich
@DavidUllrich202 · X

Late Pleistocene human population bottlenecks, volcanic winter, and differentiation of modern humans https://t.co/H6FNw6zwz8 https://t.co/dX2gJFGj0U Effective modern human population size through the late Quaternary. Revision of Haigh & Maynard Smith’s estimates of effective https://t.co/r4UUiewoyJ

Jun 28, 2025 · 2 likes · 1 share · 41,480 followers View post →
Ishrāq
@Ishraqiyyun · X

[2/3] “Atlantis” “Governments want to back off the whole arrangement but it has become difficult because the ‘Draco’ and ‘Reptilian Aliens’ have infiltrated the ‘Elite’.” Late Pleistocene human population bottlenecks, volcanic winter, and differentiation of modern humans: https://t.co/5dVOOFohCA https://t.co/Qj7GvPVwzc

Jun 27, 2024 · 1,980 followers View post →
Total clearance
@Total_clearance · X

@LudumRu Кстати, по поводу "бутылочного горлышка" афигенный доклад сделала антрополог Елена Сударикова. https://t.co/SndcDRPviC

Sep 4, 2023 · 437 followers View post →
miEgo
@MichaelEgo · X

Когда человечеству угрожало вымирание? Бутылочное горлышко. Елена Судари... https://t.co/hutHgYBJZc через @YouTube

Aug 11, 2022 · 4 followers View post →
Z Валерий Гамзатов
@wgamzatov · X

➡️А самый существенный был под 900 тыс лет назад. https://t.co/Q5ZV6KbsFE➡️

Aug 11, 2022 · 1,926 followers View post →
Изя
@hDK5P5Ai54BwrAf · X

Когда человечеству угрожало вымирание? Бутылочное горлышко. Елена Судари... https://t.co/vyg3AalW1W via @YouTube

Aug 10, 2022 · 70 followers View post →
THE WORLD
@algifaryrandei · X

Baca ambrose sama Gibbons Ambrose, Stanley H. (1998). "Late Pleistocene human population bottlenecks, volcanic winter, and differentiation of modern humans". Journal of Human Evolution. 34 (6): 623–651. doi:10.1006/jhev.1998.0219. PMID 9650103 https://t.co/RtA5SDSbnC

Jan 27, 2021 · 135 followers View post →
Lee Scott-Virtue
@Leevirtue · X

Mount Toba : Late Pleistocene human population bottlenecks, volcanic winter, and differentiation of modern humans https://t.co/i6GhBBBhyX #BradshawFoundation #BradshawFND via @BradshawFND

Mar 20, 2019 · 1 like · 4,478 followers View post →
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