Alan works at the UK Astronomy Technology Centre, and is designing software for the James Webb Space Telescope.  Alan talks about his work on the mid infrared instrument which will look at the formation of galaxies in the early universe.  He uses coding in his job and explains how you need to write algorithms to a...

A Catalyst article about the life and ideas of Albert Einstein. He is most famous for his ideas on relativity which formed the theory of general relativity, in which he showed that gravity could be explained as the effect of large masses on space. After the Second World War he also worked with other scientists and...

A Catalyst article about alchemy, the study of eternal life, salvation, and the answer to the ultimate questions about life, the universe and everything. It flourished for more than 1500 years until, in the late 1600s, the beginnings of modern, scientific chemistry edged it aside. The article looks at what was...

Adults drink more frequently than adolescents, but when adolescents drink they tend to drink larger quantities. There is evidence to suggest that the adolescent brain responds to alcohol differently from the adult brain. Scientists at the University of Oxford are...

This Catalyst article looks at the work of Alfred Russel Wallace who developed a theory of evolution in parallel with Charles Darwin; they published their findings jointly. As a scientist he was interested in lots of different things, from how different species came into existence to the question of whether ghosts...

This reliable practical allows students to use algae to look at the rate of photosynthesis with quantifiable and replicable results. In this protocol, the...

Alice and Bob in Wonderland are animations produced by the Perimeter Institute for Theoretical Physics. They are based around the questions that Alice has about the physical world and how these can lead to "powerful ideas" in physics, such as energy-mass equivalence and relativity. Topics include time travel, the...

Produced by the Royal Observatory Greenwich, this booklet gives instructions on a practical demonstration of the Doppler effect. The practical uses a portable speaker an audio software to calculate the change in frequency. Included is an online video that shows the demonstration and places it in the context of...

This podcast from the Natural Environment Research Council's (NERC) Planet Earth Online collection looks at invasive species of plants and animals. Many of them are well-known. Grey squirrels, harlequin ladybirds, buddleia, Japanese knotweed - the list goes on. Some of these aliens, or invasive species to give them...

Alison Foster has combined her education in Chemistry with her love of plants to engage in some exciting projects at the University of Oxford Botanic Gardens. This Catalyst article gives a profile of her career choices, and introduces a public engagement activity called Chemistry in the Garden.

Alison began...

This physics extension module from the Salters' Science course deals with binary digital electronic devices, taking a systems approach. Ideas of input, output and control are considered and the concept of feedback. The use of logic gates to control switches and latches...

This Catalyst article investigates materials used in jet engines. They must withstand high temperatures and great forces. Special alloys are used for structures such as turbine blades. The article is from Catalyst:...