The Evolution of Teeth
In Our Time11 Huhti 2019

The Evolution of Teeth

Melvyn Bragg and guests discuss theories about the origins of teeth in vertebrates, and what we can learn from sharks in particular and their ancestors. Great white sharks can produce up to 100,000 teeth in their lifetimes. For humans, it is closer to a mere 50 and most of those have to last from childhood. Looking back half a billion years, though, the ancestors of sharks and humans had no teeth in their mouths at all, nor jaws. They were armoured fish, sucking in their food. The theory is that either their tooth-like scales began to appear in mouths as teeth, or some of their taste buds became harder. If we knew more about that, and why sharks can regenerate their teeth, then we might learn how humans could grow new teeth in later lives.

With

Gareth Fraser Assistant Professor in Biology at the University of Florida

Zerina Johanson Merit Researcher in the Department of Earth Sciences at the Natural History Museum

and

Philip Donoghue Professor of Palaeobiology at the University of Bristol

Producer: Simon Tillotson

Tämä jakso on lisätty Podme-palveluun avoimen RSS-syötteen kautta eikä se ole Podmen omaa tuotantoa. Siksi jakso saattaa sisältää mainontaa.

Jaksot(1109)

Archive: The War of 1812

Archive: The War of 1812

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His eighth choice is The War of 1812, which was first released in January 2013. Melvyn Bragg and his ...

24 Syys 44min

Archive: Rosalind Franklin

Archive: Rosalind Franklin

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His seventh choice is the pioneering scientist Rosalind Franklin (1920 - 1958), first released in Feb...

17 Syys 51min

Archive: Plato's Republic

Archive: Plato's Republic

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His sixth choice is Plato's Republic, an episode first released in June 2017. Is it always better to ...

10 Syys 50min

In Our Time Returns for a New Series

In Our Time Returns for a New Series

In Our Time returns for a new series with host Misha Glenny.A world class seminar, every week. In Our Time explores the ideas, people and discoveries that have shaped our world, spanning history, phil...

7 Syys 2min

Archive: Empress Dowager Cixi

Archive: Empress Dowager Cixi

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His fifth choice, first released in May 2024, is the Empress Dowager Cixi, the woman who, for almost ...

3 Syys 51min

Archive: Plate Tectonics

Archive: Plate Tectonics

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His fourth choice, first released in January 2008, explores how the science of plate tectonics revolu...

27 Elo 44min

Archive: Hatshepsut

Archive: Hatshepsut

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His third choice, first released in November 2014, is the Egyptian pharaoh Hatshepsut, whose name mea...

20 Elo 47min

Archive: Coffee

Archive: Coffee

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His second choice, first released in December 2019, is the history and social impact of coffee. From ...

13 Elo 56min

Suosittua kategoriassa Historia

olipa-kerran-otsikko
mayday-fi
gogin-ja-janin-maailmanhistoria
mystista
rss-ikiuni
huijarit
tsunami
rss-historian-salaisuudet
totuus-vai-salaliitto
konginkangas
sotaa-ja-historiaa-podi
rss-i-dont-like-mondays-2
rss-peter-peter
rss-subjektiivinen-todistaja
rouva-diktaattori
rss-kirkon-ihmeellisimmat-tarinat
rss-sattuu-sita-suomessakin
rss-kulttuuriymparistopodi
hippokrateen-vastaanotolla
historiaa-suomeksi