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Quiz
The Focus Quiz
Climate change has been in the news again recently with the publication of the IPCC's latest report, but how much do you know about global warming and the greenhouse effect?
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Q&A

This instinctive reaction is called the acoustic startle-reflex eye blink and is part of the protective mechanism we all show in response to potential danger. Loud noises can often mean danger and...

The Mediterranean Sea is completely enclosed, apart from the 14km-wide Strait of Gibraltar and the 200m-wide Suez Canal, so water cycles very slowly and pollutants tend to accumulate. One third of...

According to information from the Red Cross and the Mayo Clinic, it takes between 600 and 650 kilocalories of energy for your body to replace the contents of a pint of blood. This sounds like a...

Coal contains uranium and thorium at average concentrations of around 1.3 and 3.2 parts per million respectively. When the coal is burned these elements are trapped in tiny glass spheres in the...

Actually, whether domestic horses need shoes is debated. Wild horses amble long distances daily, usually over rough grassland, which gradually builds up hard hooves. Domestic horses usually grow...

Taste is a complicated business. It used to be thought that there were separate receptor cells on different parts of your tongue for each of the five basic tastes: salt, sweet, sour, bitter and...

No. They’re more fertile than some and less than others. The fertility rate per individual is how many offspring they have. Giant panda cubs weigh only three to five ounces (85-140g) when...

Tropical rainforests don’t experience the winter and summer extremes seen in temperate rainforests. Often, tropical trees grow in a similar way all year round, meaning growth rings are not...