William: Hello, and welcome to How to… Your handy guide to handy English My name’s William Kremer…. and you’re studying English… aren’t you?
Do I sound a little uncertain? – do I sound like I’m not sure if you’re studying English? Well, in today’s programme we’ll be looking at ways for you to show that you’re not sure of something. But it’s more complicated than showing certainty or uncertainty - there are different levels of certainty. English
speakers demonstrate how sure they are of something by using words and phrases – and also by using different intonation, by saying things differently.
You may have noticed that on the How To webpage on BBC Learning English dot com, there is a large picture of a beautiful pair of eyes. But whose eyes are they? Well, that’s the question I asked my colleagues Catherine and Elena earlier on…

Jackie: Hello, welcome to the programme, with me, Jackie Dalton. This programme is all about expressions you can use when you're having a discussion or disagreement with someone and you want to tell them what you think about something. We're going to do this with the help of the British Prime Minister, Tony Blair.

(conversation)

Jackie: Hello, I'm Jackie Dalton. In this programme, we're going to look at the language we use when we make suggestions. We'll do this by listening to clips from a discussion in the BBC Learning English offices. A member of BBC Learning English is leaving the team to go and work somewhere else and her colleagues are planning a party for her. We'll hear people making suggestions about what the party could involve.

In English, suggestions are very often expressed in the form of questions.

Part of the giant physics experiment was turned off for the weekend while engineers probed a magnet failure.

But a Cern spokesman said damage to the £3.6bn ($6.6bn) particle accelerator was worse than anticipated.

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A vitamin found in meat, fish and milk may help stave off memory loss in old age, a study has suggested.

Older people with lower than average vitamin B12 levels were more than six times more likely to experience brain shrinkage, researchers concluded.

The University of Oxford study, published in the journal Neurology, tested the 107 apparently healthy volunteers over a five-year period.

Some studies suggest two out of five people are deficient in the vitamin.

The problem is even more common among the elderly, and recent moves to supplement bread with folic acid caused concern that this could mask B12 deficiency symptoms in older people.

Workers redeveloping the site of a former steelworks near Wrexham have uncovered a fossil forest believed to date back 300 million years.

Geologists are now overseeing the excavation of the site, which is 50m long, at the old Brymbo works.

The forest pre-dated the dinosaurs and was from a time when what is now Wales was hot and humid and over the equator.

It is hoped the fossils can be conserved as a heritage attraction alongside new homes and industry.

When the San Joaquin Valley was an arid grassy plain, giant kangaroo rats were the seed-hording gardeners that helped propagate native plants. Now scientists are turning to satellite technology to determine how climate change and rainfall patterns are affecting the endangered species' remaining habitat.

FRESNO, Calif. - Scientists plan to use satellite photos to count Giant Kangaroo Rats, the first-ever monitoring of an endangered species from outer space.

Scientists will examine images taken from the same satellite used by Israeli defense forces to find the circular patches of earth denuded by the rats as they gather food around their burrows. From that they plan to get the first-ever accurate population count of the rodents, a bellwether for the health of a parched plains environment.
By comparing the photos to 30 years of satellite images being released this month by the U.S. Geological Survey, researchers hope to better understand how the population has fluctuated in response to climate change and as the arrival of state and federal canal water turned the arid San Joaquin Valley into a patchwork of intensely cultivated farms and forced Giant Kangaroo Rats to concentrate on higher ground.