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A study by Newcastle University shows a 20 % sugar tax could discourage shoppers from buying unhealthy breakfast cereals.
Researchers found demand for sugary cereals fell by 48 per cent if consumers knew a tax was being applied.
The study, carried out by experts from Newcastle, York and Anglia Ruskin Universities, examined the impact of both a 20% and 40% tax on unhealthier cereals and soft drinks containing sugar. It also looked at whether telling people they were being taxed influenced the way they shopped.
People taking part in the study and were given a budget of £10 to spend on soft drinks and cereals. The products were classed by researchers as healthier or less healthy, depending upon their nutritional value.
Lead researcher, Daniel Zizzo, Professor of Economics at Newcastle University Business School, said:
Our findings suggest a 20% sugar tax would work and lead to large changes in shopping behaviour.
We know the Government is already introducing a sugar levy on fizzy drinks in 2018," said Professor Zizzo. "Our evidence shows that it could be applied to other products successfully, though I expect the size of the effect to be smaller than what we found in our study."
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Scientists in Newcastle have successfully demonstrated that praying mantis insects do see in 3-D - after fitting some of the insects with miniature 3-D glasses.
They say the research will help improve the vision of robots.
In an experiment that began almost a year ago, tiny 3D glasses have been made for praying mantises to help scientists understand sight.
In the experiments, mantises fitted with tiny glasses attached with beeswax were shown short videos of simulated bugs moving around a computer screen.
The mantises didn't try to catch the bugs when they were in 2D.
But when the bugs were shown in 3D, apparently floating in front of the screen, the mantises struck out at them.
This shows that mantises do indeed use 3D vision.
"Despite their minute brains, mantises are sophisticated visual hunters which can capture prey with terrifying efficiency. We can learn a lot by studying how they perceive the world. Better understanding of their simpler processing systems helps us understand how 3D vision evolved, and could lead to possible new algorithms for 3D depth perception in computers."
Watch: Dr Ghaith Tarawneh from Newcastle University, who says It is very exciting because insects are really simple beings and you wouldn't think they have the same level of perception as we do but obviously our experiments have demonstrated this.
Watch Professor Jenny Read, Professor of Vision Science at Newcastle University, who says we're going to compare it to how human 3D vision works.
We are going to compare it to how human 3D vision works. Is it the same? - in which case, that would be amazing that insects and humans have separately evolved basically the same sort of 3D vision, or perhaps even more interestingly, it is possible that insects have come up with a kind of cheap and cheerful 3D.
The Newcastle University team will now continue the research examining the algorithms used for depth perception in insects to better understand how human vision evolved and to develop new ways of adding 3D technology to computers and robots.
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