her research focuses on global development and environmental sustainability part of her work is to kadar and publish lots of data. really. understanding the world as it is i think it's vital that most of the developments they've seen in terms of human wellbeing have been positive hannah ritchie works at the arts with martin school a research unit founded in 2005 she and her colleagues work in interdisciplinary teams on ways to enhance the wellbeing of people across the planet and to find solutions to the world's urgent challenges such as climate change and child mortality. they also gather and present research findings on a platform called a world in data for. all to see. and i think a lot of the questions that people have researchers know where they are they started this stuff every day that it was there but it's kind of what an academic paper. and really kind of quantitative easing is that no one ever finds so really what we bring together either academic research in publications or these kind of international data set the world bank. and then we kind of try to bring it to life to take

scans to help determine what happened in zurich every kadar the link to a police investigation is scanned and in this case police a puzzled. would do this i suspect says he thinks the victim pulled a gun 1st and then he pulled a gun but that seems at odds with the location of the entry will say which is at the back of the victim's had not the front so we're trying to find out what really happened to. this. the procedure is called of a topsy a virtual autopsy a c.t. scan shows a body's bones blood vessels and soft tissues it combines a series of x. rays taken from different angles into the cross-sectional images or slices each slice is no thicker than a page dr tally finds the bullet in just a few seconds don't seem to hear form if you can see the nose here in front. again you guys are up here and this is the brain is in that i ski and if we move upward a little be see that this area of the brain shows evidence of bleeding again and that's where the bullet is that year in d.c. and. the result is play out. that's it gave me some of the evidence shows that the victim was shot from behind the

a tiger getting the same coronavirus that is killing people that's kadar, one of eight big cats hereronavirus, cause for celebration, yay what was uncovered at bronx zoo has many asking that exact question what about my pet cat and dog. first, a little background on how we got to that question. at theronx zoo nadia, a 4-year-old tigerull ofnergy and spunk. this washen she was a healthy cub. when zoo keepers noticed her wheezing with a dry cough, not eating, they wondered, could it be coronavirus a special animal testing lab, not the ones used to test humans in this pandemic, revealed nadia was infected believed to be by vets at the bronx zoo believe three lions and three other tigers might also have covid-19 but were not tested. >> at the outset, it was disbelief it really was covid but, of course, the labs are really excellent and we believe them >> we see coronavirus leading to death in humans. same concern for the big cats? >> it was the fear of the unknown. >> they have all begun improving. we expect them to make full recovers. >> reporter: this morning at zoos across the country