Gresham College provides outstanding educational talks and videos for the public free of charge. There are over 2,500 videos available on our website. Your support will help us to encourage people's love of learning for many years to come.
This talk will explore how simple changes to the circumstances can make dramatic differences to the shapes of the orbits, all of which belong to a special family of shapes known as the conic sections.
Medieval England was proudly Catholic and ostentatiously loyal to Rome. But from the late sixteenth century until recent times – and even now – anti-Catholic prejudice has been a cornerstone of English and British identity.
This talk will separate science fiction from science fact and elucidate what we know about these mysterious objects, and how they have shaped, and continue to shape, our Universe.
In this talk, Dr Wilkins will discuss the astrophysical origins of the chemical elements, almost all of which have an origin ranging from the big bang, to exploding white dwarfs, the collapse of massive stars, and the merger of ultra-compact objects, neutron stars.
This talk will review the dramatic consequences on what we observe in the night sky that arise purely from the consequences of light-travel time effects.
This talk will explain how the speed of light was first measured, and how an obscure but brilliant patent clerk in Bern, Switzerland by the name of Albert Einstein deduced that the speed of light is the upper speed limit for everything in the Universe.
This lecture will survey this ‘black legend’ and ask what made it so enduring – and why some parts of the story, such as the Inquisition’s genocidal campaign against Spanish Jews, received so much less attention than others.
This talk looks at mathematical modelling of real, complex fluids in flow situations – some with serious commercial applications, and some just for fun.