And the effects of city lights on nature. But lets start at the beginning with how we see light. When light enters our eye it hits the retina. And is received by photo receptor cells the socalled rod cells respond to light and dark the cones are responsible for color vision but we only see the light that actually enter his our eyes if you are in zambia wanted to know more. Light travel. During a thunderstorm or you see the lightning straight away but we hear the thunder. Thats because sound waves move slowly or as light travels super fast. 300000 kilometers per 2nd. It maintains that speed in space where theres a vacuum and it moves only slightly slower through the earths atmosphere but other media slow it down for example water in which it travels at a mere 225000 kilometers a 2nd. Light travels like ripples spreading on the surface of a liquid in all directions simultaneously. And in Straight Lines which is why we talk of light rays sometimes its even possible for us to see the. Ligh
Attack on free media. Journalists must feel safe. In europe. Also coming up at recruiting future neo nazis a report on the growing popularity of mixed martial arts here in germany and why its attracting hooligans and far right extremists. But. Full contact sport i think thats the thing which is the most appealing for them if they develop one with the right wing we see in not only in sports that we see in a hostile society. But to our viewers on p. B. S. In the United States and all around the world welcome we begin the day with a sobering statistic for those of us who work and report the news in 201949 journalists were killed doing their job and its yearly reports Reporters Without Borders says that most journalists who were killed were killed in just 5 countries they are syria mexico afghanistan pakistan and somalia the good news is that that number is a 16 year low but all over the world there is a disturbing trend journalists being detained and arrested arbitrarily and many end up i
Its make or break in the bundesliga clubs are fighting it out at the top in the middle and on the ball so were just 2 games left before the main season break matchday 16 is everything a football fan could possibly want. League leaders lifesaver just days away from being top of the table at christmas for the very 1st time in their 4 year top flight history if they have to do it is just a small matter getting passed. And the excitement continued into these 3 other matches one of those so braman take on meits 2 sides who are trying to stick clear from any relegation trouble. Welcome to this very special midweek edition of the bonus league here on the w. Im that mechanic line leipzig not off the ball as they get thrown on match day 15 and now the bulls have a very good chance of finishing the year at the top of the table in his 1st season at the club union dogman has turned the red bulls into the raging bulls if they had to stay at the top they need to win their 1st ever title they need to
At todays goods the evolved from the freedom in dinosaurs and now theyre forced to make a whole city adapted for the changing environment has been the route to survival but the speed of climate disruption is outstripped the capacity of many species to adapt hello welcome to eco india im someone coming to you from mumbai in india making a head start in the direction of adapting to the changing climate is the doll of the human body in the south indian state of it has set itself the ambitious deadline of becoming indias 1st Carbon Neutral town by 2020 we travel to me and im going to take a look at how far the fuck. Loves his evening stroll around his coffee. The organic shed grown robust a coffee grows is a speciality in the Southern State of carolina. This is very robust we count the number of clusters on each branch. But but all you for the best Coffee Harvest there should be turkey nobodys clusters on. These but dish and in the queen mina there is special it is on the verge of becoming
A compromise we can raise with stop taking up space but youll both. Get out of our why were terribly sorry madam chair but we cant accept history and im terribly sorry im not a president we cant find the document it seems that we need to be sensitive it really thinks. We need to stop planet. Also coming up to dissent and disappear in a dictatorship 20 years ago in the former soviet republic of belarus suspected death squads silenced opposition politicians in a d. W. News exclusive youll meet a man who says he was one of the killers. Yeah but in a free scream youth to my sincere condolences i took part in the i can show you the burial site on a map the rest is up to you and better russas Law Enforcement system. To our viewers on p. B. S. In the United States and all around the world that welcome we begin the day with the longest u. N. Climate talks ever held and the shortest list of accomplishments to show for 2 weeks of marathon talks of madrid have ended and delegates are lamenting a