What happens to carbon dioxide after we emit it? Half is absorbed within a year or two by plants and the oceans, the rest, in effect, stays in the atmosphere. So, does that mean we have to halve emissions to stop concentrations rising? Unfortunately, no. Despite the vast reserves of carbon dissolved in the oceans, […]

Read more "The Carbon Cycle Behind Net Zero"

Christopher Wren, who died 300 years ago this year, is famed as the architect of St Paul’s Cathedral. But he was also Gresham Professor of Astronomy, and one of the founders of a society “for the promotion of Physico-Mathematicall Experimental Learning” which became the Royal Society. This lecture explored some of Wren’s mathematical work on […]

Read more "The Mathematical Life of Sir Christopher Wren"

Sir Christopher Wren was one of the most remarkable Gresham Professors of Astronomy. Though best known today as the architectural mastermind behind the rebuilding of London after the Great Fire, Wren’s appointment to the Gresham chair in 1657 stemmed from his enthusiasm for turning his gaze well above London’s skyline and focussing his attention on […]

Read more "Christopher Wren’s Cosmos"