Sunday, 8 December 2013

Frankincense under threat, says study


Summary
26 December 2011
religious ceremony
Frankincense is used in religious ceremonies throughout the world

Researchers in the Netherlands say that frankincense, a significant item in the Christmas story, faces an uncertain future. In the Journal of Applied Ecology, they warned that the production of the fragrant substance could decline by half over the next 15 years.
Frankincense is burned in religious ceremonies throughout the world. The sweet-smelling incense is produced from resin tapped from the Boswellia tree, which grows in the drylands of Africa and the Arabian peninsula.
But this delicate tree is struggling to sustain itself.
The team monitored the survival and growth of more than 6,000Boswellia trees in Ethiopia. They used the data to model the changing population of the trees and discovered that this was declining dramatically.
Tapping trees for resin doesn't affect their survival at all. Instead, young trees often fail to get established as they're eaten by livestock or pushed out by faster-growing species.
The scientists say that Boswellia plantations should be carefully protected for up to 10 years while the saplings mature. Measures like this could safeguard the future of a product that's been traded since long before the time of the Christmas story.

resin - sticky substance that runs inside the trunk of trees
drylands - areas with a small amount of moisture
struggling to sustain itself - having difficulty in keeping alive
monitored - watched carefully
to model the changing population - to make a projection of the number of specimens in the future
declining - reducing
livestock - farm animals
pushed out -forced out of the area
safeguard -protect
traded -bought and sold


Heavy armour might have defeated 'knights'

Summary
22 July 2011
Medieval armour was so heavy that it could have seriously impacted on a soldier's performance, a study from the University of Leeds suggests. According to the research, the protective suits may have influenced the outcome of battles.
Experiment at the University of Leeds
As weapons became more and more sophisticated in medieval Europe armour also evolved, and by the 15th century soldiers would have been clad top-to-toe in up to 50kg of bulky steel.
Researchers have always suspected that this would have been tough to move around in. But now with the help of volunteers wearing replica medieval armour - and a treadmill - they've been able to confirm this.
They found that walking or running in it used up huge amounts of energy, restricted breathing and bore intense pressure on the legs.
The effect was so great the team suspects it could have played a part in France's defeat in the battle of Agincourt.
In this famous conflict of 1415 - despite heavily outnumbering the English - the French were beaten.
The scientists say the fact that the French knights had to trek through a muddy field while wearing their heavy armour - to meet a stationary English line - would have left them so exhausted, it probably led to their downfall.


clad top-to-toe in (something) - wearing something from head to foot
bulky -large and difficult to manage (objemný)
tough -difficult
a treadmill - a fitness machine used for walking and running (běžící pás)
restricted –limited (nepřístupný, tajný)
played a part in (something) -been partly responsible for
outnumbering -having many more soldiers (mít početní převahu)
to trek -to make a slow and difficult journey (putovat , táhnout těžkým terénem)
exhausted - very tired

downfall - losing the battle (pád)

Wednesday, 4 December 2013

Climate change 'spreads crop pests'



2 September 2013
Potato beetles
Global warming is helping pests and diseases that attack crops to spread around the world, according to a new study published in the journal Nature Climate Change. Researchers from the universities of Exeter and Oxford found crop pests are moving towards the poles as regions warm.
For listening click here

Report

The researchers looked at more than 600 crop pests from around the world.
These included fungi, such as wheat rust, which is devastating harvests in Africa and the Middle East; insects like the mountain pine beetle that's destroying trees in the US; as well as bacteria, viruses and microscopic nematode worms.
They found that over the past 50 years, these destructive species have been on the move. On average, they're spreading 3km every year, shifting north and south towards the poles.
The scientists say this correlates with warming temperatures, allowing the pests to take hold in areas that were once too cold for them to live in.
Currently, between 10% and 20% of the world's crops are lost to pests - and the team warns that rising global temperatures could make the problem worse. The researchers say that improved surveillance of the problem is needed.
Pests - insects or small animals that damage crops
fungi (singular: fungus) - organisms that eat decaying material (e.g. mushrooms)
harvests - crops which are cut and collected
on the move - going from one place to another
correlates with - is related to, has a direct link to
to take hold - to become established
surveillance - close observation



Sunday, 1 December 2013

Jurassic bugs


Summary

30 August 2012
Scientists say they've found the oldest bugs of their type ever preserved in fossilised tree resin, in the Alps of northern Italy. The finding by an international team of researchers has been published in the Proceedings of the National Academy of Science.
Reporter:
Mark Duff
New species of ancient gall mites
New species of ancient mites were found in 230-million-year-old amber droplets.

Listen

Click to hear the report and vocabulary

Report

High in the Dolomites of northeastern Italy, Italian researchers chipping away at rocks formed more than 200 million years ago found two miniscule mites and a fly preserved in tiny drops of amber. Highly-magnified photographs of the creatures show the mites, in particular, to be perfectly preserved. At 230 million years old, they're about 100 million years older than the oldest previous find of their kind.
The bugs probably fed off the leaves of the tree in whose resin they were eventually preserved. Researchers say the discovery shows the mites' ability to adapt to changing evolutionary conditions. For film lovers, though, it has striking echoes of the Stephen Spielberg blockbuster, Jurassic Park, in which a team of scientists use the DNA of a mosquito preserved in amber to recreate dinosaurs with predictably terrifying results.

Vocabulary

SHOW ALL | HIDE ALL
chipping away at
knocking off bits of (rocks)
miniscule
very very small
preserved
maintained in its original state
magnified
close-up
resin
sticky flammable organic substance
adapt
adjust, cope with
striking echoes
close similarities
predictably
expected

End of the world?


Mayan temple ruins at dusk
The Mayan people plotted the stars to predict the future
The Mayan calendar began 5,125 years ago. It predicted that the world ends on 21 December 2012. Mayan people lived in Central America and studied the movement of the stars and planets to make their calendars.
In this week's 6 Minute English, Alice and Kaz talk about the prediction and what it means.
This week's question:
Alice asks Kaz what 21 December is called in English?
a) the winter equinox
b) the winter solstice
c) midwinter
Listen out for the answer here
equinox -date when day is the same length as the night
solstice-  when the sun is at the highest or lowest position relative to the equator
return to our roots - to go back to where we came from, to think about how we were created
mother earth - the creator
spawned - released a large number of
a glut of - an excessive amount

Alice: Hello and welcome to 6 Minute English from BBC Learning English: we’ll be talking about a story in the news and learning some vocabulary along the way.
I’m Alice and joining me today is Kaz. Hi Kaz.
Kaz: Hi there Alice.
Alice: Now, if you’re listening to this programme on the 21 December 2012 or after, then I’m very happy to say that the world hasn’t ended.
Kaz: Alice, what do you mean the world hasn’t ended?
Alice: Well, according to the ancient Mayan civilisation, the people who lived in Central
America 4,000 years ago, the world was supposed to end on December 21, 2012.
Kaz: I see. Well, thank goodness they got the day wrong.

Alice: It’s very interesting though, because the ancient Mayan calendar said December
21 2012 marked the end of a 5,000 year cycle. We’ll find out more in a minute, but first my question of the day. Kaz, December 21 is an important day in the calendar because it is usually the shortest day of the year in the northern hemisphere.
Now, what’s the word in English for this? Is it:
a) the winter equinox
b) the winter solstice
c) midwinter
Kaz: I’d say midwinter.
Alice: Well, as usual, we won’t hear the answer until the end of the programme. Now let’s find out more about the Mayan people and their calendar, which dates back over 5,000 years. Professor Pedro Yac, from Guatemala, held a ceremony on a beach in Havana, Cuba, to mark the end of the Mayan calendar cycle. December 21,2012 may not mark the end of the world, but Yac hopes people will use it as a day to think about what is important in life:
Professor Pedro Yac:
Enough of the culture of fear. We should stop planting fear. Not in the present generations, not in the future generations. We have to return to our roots. We are the children of mother earth. When we forget this everything becomes complicated.
Alice: So, Professor Pedro Yac says he hopes humanity returns to its roots – to think about where we came from, how we were created.
Kaz: He says people are children of mother earth – the earth is considered to be the source of all living things. 
Alice: And he thinks that when people forget where they come from, everything becomes complicated.
Kaz: Interesting. He says we should stop planting fear – spreading fear.
Alice: What’s really interesting is how many people believe that the end of the world will happen soon. According to a poll by Reuters IPSOS earlier this year, nearly 10% of people believe that the end of the world is nigh - is coming. Here are two interesting pieces of language to listen out from the next speaker. "Humanity’s time on earth is up", which means people will die out, and "Doomsday". What’s Doomsday Kaz?

Kaz: Doomsday is the name given to the day the world will end.

Alice: Here’s reporter Tom Santorelli:
Reporter Tom Santorelli:
Last May a Reuters IPSOS poll found that nearly 10% of people worldwide go along with the interpretation that humanity’s time on earth is up. The Doomsday prediction has spawned a glut of films and books on the subject.
Alice: Reporter Tom Santorelli says the Doomsday prediction has spawned a glut of films and books about the end of the world. A glut of – it means a lot of.
Kaz: And he used the verb 'spawned' – we usually hear that in the terms of frog spawn, the thousands of little eggs a frog lays, which grow very fast.
Alice: And as the world hasn’t ended, I wonder what we can conclude from the end of this Mayan calendar cycle. Here’s archaeologist Richard Hensen, who says it marks a new era – a new period in time.
Archaeologist Richard Hensen:
What we see is a new era. We are privileged to witness and enjoy the end of one era that started 3,114 years before Christ. It’s rare to have an opportunity like this to experience a very important date.
Alice: Archaeologist Richard Hensen, who says we are privileged, fortunate, to witness and enjoy the end of one era, and experience a new one.
Kaz: He says it’s rare to have an opportunity like this to experience a very important
date.
Alice: Now, that question I asked you at the beginning of the programme, Kaz. What’s the name in English for the event that usually happens on or around December 21 every year in the northern hemisphere?
Kaz: And I said midwinter.
Alice: Well, it’s a bit of a trick question. Midwinter can be around December 21, but we usually think of it as a longer period of time. And the winter equinox doesn’t exist. Equinox means that the day is the same length as the night – so that usually happens in March and September. So the answer I was looking for is ‘the winter solstice’. It’s the day when the sun at noon is at its lowest altitude above the horizon.   
Kaz: I see. So, that usually occurs in the northern hemisphere sometime around
December 21.

Alice: Yes that’s right. And before we go Kaz, could you read us some of today’s words and phrases?
Kaz: I’d be delighted. We heard:
Equinox, solstice, return to our roots, mother earth, spawned a glut of
Alice: Thanks Kaz. And please join us again soon for more 6 Minute English from
bbclearningenglish.com.
Bye for now.

Kaz: Bye