this is moldovan athlete dmitri voloshin running 50km for charity at the coldest place in the northernre shows a wind—chill of over —60 celsius. he finished in six hours, a new record at such low temperatures. and from one extreme to the other. the australian summer shatters temperature records. it is the hottest summer here, with peaks of near 50 celsius. there are wildfires, too, including these which destroyed homes in victoria in march. the australian bureau of meteorology says the warming trend in the country is consistent with warming across the globe. this looks like a summer fire, but this is winter in the uk after the record february heat and a long dry spell. this fire broke out on moorland in yorkshire. warmer spells of weather happening earlier in the year are expected to make fires like this more common. i am still at wakehurst, but i have come inside to a very special place, the millennium seed bank. it is where they collect billions of seeds from varieties across the world. it is a huge project. janet terry is the seed collections manager. why collect so many seeds? we a