matthew, janice hasan and his colleagues from the mental research institute at the university of pretoria or trying to take scientific samples for the benefit of well kind. so in the arrow, the some box, the hooks and that hook some of the skin old lava said the skin is blushed for an injustice. then glover on the front 2 parts of 3, use it for different devices and it's not painful that i mean it feels hardly like a bee sting or something just like a quick sharp pain. and sometimes they just flip the tail upwards. generally, as a result, they normally just stop down and then within a few minutes the, that under the, to the bay of that bonus, just east of k town is a wind to base for many southern ride whales. they migrate thousands of to them. it is from the feeding grounds of antarctica to calls into sheltered voices, but the number is coming too, so that we could have been dropping for some time. now. the researches of trying to find out why, of the back on land, the scientists return to the nav to process and label the skin samples and link them others with a cos the samples of and fr