This article looks at how signals from the eyes are interpreted by the brain, unconscious perceptions, and what brain disorders can tell us about consciousness.

This Catalyst article introduces Henry Gosse, an expert naturalist. He devised an alternative explanation for the fossil record, but it failed to impress his peers.

This article is from Catalyst: Secondary Science Review 2016, Volume 27, Issue 1.

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This Catalyst article explores whether the use of mobile phones increases the risk of cancer, including a recent study from Denmark which investigates the issue further.

This article is from Catalyst: Secondary Science Review 2011, Volume 22, Issue 2.

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This Catalyst article looks at the process of photosynthesis, by which plants make a range of biochemical compounds. The article explains how photosynthesis actually ties in with growth. Respiration is happening all the time in all cells in all living organisms. Taken on its own, photosynthesis adds materials to...

A Catalyst article about the International Year of Physics, in 2005, also known as Einstein Year. In the century since Einstein’s “annus mirabilis”, when he developed his theory of relativity there has been a revolution in the study of physics. This article explores the links between some of the architects of this...

A Catalyst article about the video or computer games industry which is now the biggest entertainment-based industry on the planet. Often it is physicists developing new concepts, hardware and games. To beat the competition they need to make physical aspects of the game be more realistic or at least appear to be...

A Catalyst article about phytoplasmas which are micro-organisms that affect crop plants modifying their growth. The article looks at the damage that they can inflict on crops which in turn can cause famine. Botanists are seeking to counter the effects of phytoplasma disease and the article looks at laboratory...

This Catalyst article explains how scientists came to understand plants' sensitivity to external stimuli and their ability to move. Mimosa pudica...

This issue of Big Picture provides lots of interesting information about flowering plants and their uses. 

The plant hormones animation explores the action of indole-3-acetic acid (IAA) and shows how scientists used experimental evidence to explain the role of auxins in a phototrophic response.

The...

One of a series of articles for post-16 students published by Science and Plants for Schools (SAPS). Plants attacked by herbivores or pathogens respond by synthesising additional physical and chemical defences and so increasing their resistance to subsequent assaults. The induced defences are initiated close to the...

A Catalyst article looking at the chemicals that are in plants and trees and the role they play in the life of the plant. Starting with photosynthesis the article moves onto naturally occurring chemicals and explains why plants need fertilisers. Growing salad crops hydroponically is also examined.

This...

A Catalyst article looking at how plants develop large surface areas both in the air (leaves) and in the soil (root hairs) to get all they need from the environment. The article explores the relationship between plants and soil and looks at new research on fungi in soil and their involvement with the mineral...