to one of the world's most renowned artists, from the mona lisa to the last supper, leonardo da vinci's the work speaks for itself. -- leonardo de vinci's work speaks for itself. we have a preview. >> the artist as anatomist. leonardo da vinci depicts the human body in the astonishing detail. three-dimensional structures are revealed with extraordinary clarity. it is the biggest ever exhibition of its kind. is it art or science? >> they are scientific papers. they may seem beautiful, but they are not works of art. we find them beautiful. we find them moving and fascinating and so on. they are expressions of the human spirit that match art, but it is not art, it is science. >> da vinci injected wax into the brain so that he could draw it more accurately. he created a model of the aortic valve. these drugs were made following his dissection of a 100 -- these drawings were made following his dissection of a 100-year-old man. the museum in london contains thousands of anatomy specimens collected during the 18th century. leonardo's drawings were still unpublished and would remain so for anot

when you're talking about leonardo da vinci, it could be both. welcome to our viewers on pbs in america and also around the globe. a few small islands are as strategically important as bahrain. it is in the middle of the persian gulf, a gateway for a ran past -- for iran's oil exports, and home to merica's fifth naval fleet. >> reports of talks today for iran's jailed activist. abdulhadi al-khawaja was jailed last week, sentence by a military tribunal. he has been on hunger strike since february. today's ruling means he will remain in custody until his sentence is reviewed by the court. >> he told me that, "my hunger strike is not for negotiation. i'm not going to stop until i am free, either by death by coming out of jail. i am not going to stop." think the government is assassinating -- i think the government is assassinating my husband in a very slow and painful way. >> the allegation that the government means any harm to al- khawaja is untrue. we regularly report on his health. he is visited regularly by the danish ambassador and his family.

sometimes it's almost as if leonardo da vinci wanted to keep us all guessing.stani, nbc news, london. >> all right so now number five on our first five web stories, jackie robinson, 65 years ago today he broke baseball's color barrier when he played his first major league game for the brooklyn dodgers. today, every player throughout the big leagues will wear number 42 in honor of jackie robinson. zap technology. departure. hertz gold plus rewards also offers ereturn-- our fastest way to return your car. just note your mileage and zap ! you're outta there ! we'll e-mail your receipt in a flash, too. it's just another way you'll be traveling at the speed of hertz. pssst! don't go in there! it's your surprise party and we want this hair color to be party ready. let's get some dimensional color. now!? what if it comes out wrong? [ gigi ] nice 'n easy gets your right color every time. guaranteed. in one step get tones and highlights for a gorgeous result. now, go party! surprise! surprise! surprise! surprise! i had no idea. [ gigi ] nice 'n easy. available in origin

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and then a new look at leonardo da vinci from a restoration of his last great work to a first publicu the resurgence of this renaissance master. and every celebrity cook seems to have their own line of pots, pans, gadgets. we're going to see who's the top chef when it comes to cook ware. no steaks there. sorry, al. that and more right here on "today." >> that egg looked pretty good. >> thank you, amy. >> now al has a check of the weekend weather. >> all right, let's show you what we got. we are concerned, midsection of the country. there's a high risk of strong storms and tornadoes from texas and oklahoma on into parts of minnesota. we're looking at sunshine in the pacific northwest. sunny and mild alone the eastern seaboard. warm through the gulf. then on sunday, sunday, we have more showers in the northeast, and new england. risk of strong storms, from the great lakes down into the gulf coast. sunny and mild from texas on into the southwest. and showers and snow showers in the central rockies. the pacific looks -- pacific northwest looks fantastic with plenty of sunshine. >> this i

ultimate sophistication, in sophistication, in steve jobs' book, goes back to l book, goes back to leonardo da vinci's w vinci, but that's what our guys have have done with this thermostat. it can connect to t it can connect to the internet. it knows when you' it knows when you're in, when you're out. you're out. starts to learn you starts to learn your lifestyle. something like this, something like this, when you consider that half of consider that half of your energy use is your energy use is your heating and cooling system, and cooling system, and all of that can be can be controlled through this thermostat, you can thermostat, you can cut by without affecting y without affecting your comfort. nobody wants to sav nobody wants to save energy and be warmer in the s be warmer in the summer, colder in the winter or hav in the winter or have a car that doesn't go like the doesn't go like the last one did. so so you've got to find a do that and this th do that and t it. it. our guys have done a our guys have done a tremen job. job. it connects with the it connects with the internet, which is important