helen briggs, bbc news.f pisa is not leaning quite so much as it used to. 17 years after the first phase of rescue work ended, and it was re—opened to the public, new measurements show that it has continued to straighten, and the top is now four centimetres closer to vertical. the tower has leaned ever since it was completed in the 14th century. time now on bbc news for sport today. hello, this is sport today, live from the bbc sport centre. coming up on this programme: australia win the opening match of their twenty20 series against india, as the weather plays a part. we will take a look at the next nominee for bbc african footballer of he year, ghana's thomas partey. and the mclaren formula 1 team say the door remains open for fernando alonso, despite this weekend's abu dhabi grand prix being his last. hello and welcome to the programme, where we start with cricket, and the news that australia beat india byjust four runs on wednesday in the first of their twenty20 international matches in brisbane. austral

helen briggs, bbc news.ewards citizens for taking sustainable modes of transport. the bbc‘s ‘world hacks' team has been exploring the social and environmental benefits of taking residents out of their cars — and encouaging them to move aroud the city in a greener way. travelling green can now earn you free stuff, like beer, ice creams or cinema tickets. so how does it work? in the italian city of bologna, and antipollution scheme is rewarding people who get out of their cars and cycle, walk or take public transport instead. it is called bella mossa or "good job". urban planner, marco amadori, set it up in 2017, to make sustainable travel more appealing. so first you download the betterpoints app. log your green journeys and finally swap your points for rewards. for the first time we have been able to involve all people. everybody will have the possibility to change a car trip in to a bike trip or a bus trip and be able to get some discount for good behaviour. over 100 local businesses have signed up to give

our science correspondent helen briggs reports. coming down into the vault itself.ex countryside, a bomb—proof, flood—proof, radiation—proof vault. it contains store rooms kept at —20 degrees. we put our coats on... and everywhere you look, there are seeds. the scale of the operation. large seed collections in these kilnerjars. you can see all of these, drawer after drawer after drawer, 90,000 collections of 39,000—plus species. seeds from nearly every country can be found within these walls, an insurance policy against the extinction of plants in the wild. but not all seeds can be preserved in conventional seed banks. it doesn't give full cover for some very important groups of plants, particularly threatened species, rainforest trees and even in the uk, some iconic species, the oaks, their seeds cannot stand drying and cannot be frozen. we need to work on alternative methods. one alternative being tested is cryopreservation. it involves separating the plant embryo from the rest of the seed. in this state, it can survive very cold temperatures. when thawed out, it

here's our science correspondent helen briggs.s signature song evolves gradually over time, as individual males add embellishments, and others copy. seen here off the east coast of australia, this is what the whales were singing two years later. but every now and then, a song completely disappears from the oceans, and it is replaced by something new in what scientists call a "revolution event". normally, when a song is evolving through gradual changes, you can hear the songs from one year to the next and hear those similarities. but with a revolution, the song is completely different, they essentially they start from scratch with a revolution. researchers studied whales over 13 years and found when they changed their tune, the new ballads were almost always more simple. it tells us there could be some kind of limitation to that learning, so there might be some kind of cap either in terms of how complex a thing that they can learn, or how much new material they can learn at one time. and that could explain how the crooners of the s

helen briggs, bbc news.are looking to do a little exercise before we pile up our plate but this next story gives new meaning to taking a long walk. 38 year old matt green has logged more than 9000 miles over the past seven years — visiting every block in the five boroughs of new york city. he is now 500 miles short of reaching his goal and a movie comes out this week documenting this amazing urban trek. but why he's doing it remains a bit of a mystery as tom brook reports. chinatown in new york on a typical day. people go about the business, for that green that means continuing his marathon 9000 male new york city what. i am watching every block of every street in the five boroughs. also parts, cemeteries, beaches, covering all the ground and public area and seeing what is there. while he has been on his walk matt greene has lived on as shoestring staying in different departments in exchange for activities such as cat sitting and raising money for donations to his outside. strangely he says he doesn't know w

here's our science correspondent, helen briggs.g from the same song sheet this signature song evolved gradually over time as individual males add embellishments and others copy. senior on the east coast of australia this is what the whales we re australia this is what the whales were singing two years later. every now and again a song completely disappears from the oceans of the and it is replaced by something new in what scientists call revolution event. normally when a song is evolving through gradual changes you can hear the songs from one year to the next and hear those similarities. but with the revolution the song is completely different, century they start from scratch. researchers at it whales over 13 years and found when they changed their tune, the new ballots we re changed their tune, the new ballots were almost always more simple. changed their tune, the new ballots were almost always more simplem tells us there could be some kind of limitation to the learning so they might be some kind of cap either in terms of how com

our science correspondent helen briggs has been to speak to scientists who say trees grown in test tubesou can see all of these, drawer after drawer after drawer, 90,000 collections of 39,000—plus species. seeds from nearly every country can be found in these walls, an insurance policy against the extinction of plants in the wild. but not all seeds can be preserved in conventional seed banks. it doesn‘t give full cover for some very important groups of plants, threatened species, rainforest trees and even in the uk, some iconic species, oaks, their seeds cannot stand drying and cannot be frozen, we need to work on alternative methods. one alternative being tested is cryopreservation, separating the plant embryo from the rest of the seed. in this state, it can survive very cold temperatures. when thawed out, it will grow into a new tree. this baby oak tree has come out of the deep freeze and is starting to grow. trees in a test tube could be the answer to protecting our forests in the long—term. trees face many threats in the wild, from climate change to diseases like ash dye—back, which

here's our science correspondent helen briggs.er time as individual males embellish it and others copy. whale song. this off the east coast of australia, is what the whales were singing two years later. whale song. but every now and then a song completely disappears from the oceans and is replaced by something new in what scientists call a revolution event. normally when the song is evolving through gradual changes you can hear the songs from one year to the next and you hear the similarities. but with a revolution the song is completely different. they essentially start from scratch with a revolution. researchers studied whales over 13 years. they found that when they changed their tune the new ballads were always more simple. what this tells us is that there might be some kind of limitation to that learning, so there might be some kind of cap, either in terms of how complex a thing they can learn, or how much new material they can learn at one time. and that could explain how the crooners of the sea adapt and change their songs

our science correspondent helen briggs has been to speak to scientists who say trees grown in test tubesof all the convenience store rooms kept at —20 degrees. and everywhere you look, there are seeds. large seed collections in these jars. you can see all of these, draw after draw after draw, 90,000 collections of 30 9000— plus species. seeds from nearly every country can be found in these walls, an insurance policy against the extinction of plants in the wild. but not all seeds can be preserved in conventional seed banks. but not all seeds can be preserved in conventional seed banksm doesn't give full cover for some very important groups of plans, threatened species, rainforest trees and live in the uk, some iconic species, oak trees, there seeds cannot stand drying and cannot be frozen, we need to work on alternative methods. one alternative being tested is cryopreservation, separating the plant embryo from the rest of the seed. in this state, it can survive very cold temperatures. when ford out, it will grow into a new tree. this baby oak tree has come out of the deep freeze and is st