Skip to main content
Become an Ri Member
  • What's on
  • Learning
  • Explore science
  • Christmas Lectures
  • Visit
  • Support us
  • About us
Become an Ri Member
Video Heinz Wolff standing next to a contraption with a drawn-on face

CHRISTMAS LECTURES

Signals from the interior – You as an engine (1975)

Heinz Wolff demonstrates how to measure the efficiency of the human engine, comparing it with that of a petrol-driven generator.

Signals from the interior – You as an engine (1975) Read more
Video A sketch of a walrus and a man in a top hat by the sea

CHRISTMAS LECTURES Physics Technology and engineering

The engineer through the looking glass – The time has come the Walrus said (1974)

Eric Laithwaite uses the concept of analogies (fairy stories) as a way to explain complex topics in science including objects

The engineer through the looking glass – The time has come the Walrus said (1974) Read more
Video Eric Laithwaite speaking to a group of children iin the Ri theatre

CHRISTMAS LECTURES Physics Technology and engineering

The engineer through the looking glass – The Jabberwock (1974)

In this controversial Lecture, Laithwaite used behavioural gyroscopes in an attempt to challenge the validity of Newton’s Laws

The engineer through the looking glass – The Jabberwock (1974) Read more
Video Eric Laithwaite in his 1974 CHRISTMAS LECTURE

CHRISTMAS LECTURES Physics Technology and engineering

The engineer through the looking glass – Jam yesterday, jam tomorrow (1974)

Through the title of this third lecture and the theme of chess running through Alice's adventures, Eric Laithwaite introduces

The engineer through the looking glass – Jam yesterday, jam tomorrow (1974) Read more
Video A till of Eric Laithwaite a tthe 1974 CHRISTMAS LECTURE

CHRISTMAS LECTURES Physics Technology and engineering

The engineer through the looking glass – Tweedledum and Tweedledee (1974)

Taking Lewis Carrol’s twins as his starting point for his second lecture, Eric Laithwaite explores the principles of symmetry in

The engineer through the looking glass – Tweedledum and Tweedledee (1974) Read more
Video Two chess sets on the floor, in between a child

CHRISTMAS LECTURES Physics Technology and engineering

The engineer through the looking glass – Looking glass house (1974)

Eric Laithwaite explores the concept of 'reflection', from concepts of the smallest particle to those of the whole universe.

The engineer through the looking glass – Looking glass house (1974) Read more
Video David Attenborough holding a monkey, who is wearing a yellow dungarees

Biology and the human body CHRISTMAS LECTURES

The languages of animals – Animal language, human language (1973)

Sir David Attenborough explores the language of animals and shows how it can, at times, be unexpectedly complex.

The languages of animals – Animal language, human language (1973) Read more
Video a baby bird being fed by a larger bird

Biology and the human body CHRISTMAS LECTURES

The languages of animals – Foreign languages (1973)

Sir David Attenborough reveals how animals interact and communicate with different species.

The languages of animals – Foreign languages (1973) Read more
Video David Attenborough speaking in the Ri theatre, in front of a sketch of a rabbit head

Biology and the human body CHRISTMAS LECTURES

The languages of animals – Parents and children (1973)

Sir David Attenborough explores the relationship between animals and their infants.

The languages of animals – Parents and children (1973) Read more
Video A small black bird on a branch

Biology and the human body CHRISTMAS LECTURES

The languages of animals – Be mine (1973)

Sir David Attenborough shows how across the animal kingdom, species have developed myriad ways to advertise for a mate.

The languages of animals – Be mine (1973) Read more

Pagination

  • Previous page ‹‹
  • Page 30
  • Next page ››
Back to top

Subscribe to The Ri Newsletter

Sign up now

About the Ri

The Royal Institution is an independent charity dedicated to connecting people to the world of science.

Contact us What we do

About us    Jobs

Venue hire

Make your next event one to remember at our unique central London venue, steeped in 200 years of science history.

Find out more

Support us

Support us in our charitable mission to create opportunities for the public and scientists to explore science together.

Donate online Join the Ri

More ways to support

The Royal Institution, 21 Albemarle Street, London W1S 4BS

Find us Museum Licensing Shop

The Royal Institution of Great Britain was granted a royal charter in 1800 and is registered as a charity in England and Wales (227938).

© Royal Institution 2025
  • Terms and conditions
  • Web accessibility
  • Policies
  • Safeguarding

The CHRISTMAS LECTURES® are a registered trademark