. >> reporter: you know when you start a marathon session in antarctica, it's going to be hard. chris and other racers packed into a soviet-era plane to get to their destination. >> this plane didn't have windows. it was really janky inside . we ended up landing, and i remember the moment that the doors opened and we stepped outside. the sun was so bright that we had to wear sunglasses because the sun reflecting off the snow. >> reporter: this is the route for the world marathon challenge. participants charter a flight. they start in antarctica, stop in south africa, australia, dubai, madrid, brazil, and end in miami. each time running an entire marathon with very little down time in between. >> the hard part was managing nutrition, recovery, just getting from place to place. and over the course of the races, a number of racers got injured, so there were wheelchairs and various support staff and medics helping us. >> reporter: chris spent a year training, running on the streets of san francisco as much as he could, all while juggling work and parenting a 2 and 6-year-old with th

although when they grow up, they'll still be the smallest penguins in antarctica, standing at a littleet tall. despite their size, adelies are impressive. for starters, they're amazing swimmers. when out fishing, they've been known to travel upwards of 185 miles round trip to feed their chicks. their diving skills are also right up there. or down there. amazingly, adelies can dive nearly 600 feet down for a meal of fish and krill. that chick's giving its wings a good stretch, but it'll have to wait until it molts before it can go flying underwater. not many creatures get an ocean view complete with icebergs, but that's all part of a normal day for king penguins. the chicks are enormous. not surprising though, since king penguins are the second largest of all the penguin species. eventually, these big downy babies will grow to weigh about 30 pounds and stand nearly three feet tall. everything is big about these birds. look how many chicks are clustered together in this creche. that's just the beginning. the colonies can be made up of hundreds of thousands of birds. king chicks are quite

the journey for this san franciscan began in antarctica, running in the cold and snow.h africa, australia, dubai, madrid, and brazil, with the final leg in miami. adele says the most difficult thing is the logistics of it all. >> the hard part was managing nutrition recovery. just getting from place to place and over the course of the races, a number of racers got injured, so there were wheelchairs and support staff and medics helping us. >> he spent a year training on the streets of san francisco. in total, he ran more than 183 miles that week to compete the world marathon challenge. >> it was a feeling of just immense physical pain, but on top of that, there was a sense of peace, where i realize the experience may never happen again. so i almost felt like i was in a dream the last three miles, running by myself towards the finish line. >> well, participating in that is not cheap. and the challenge is nearly $50,000. seven marathons, seven days, seven continents. why? okay. that's it for the news at 5:00. cbs news bay area with juliette goodrich starts right now. i'm i

(wind whistling) - [graham] antarctica, the only continent with no native human population.rage temperature during its winter is -30 degrees fahrenheit. covered almost entirely by ice, it's home to 70% of the world's fresh water.

i current undersee cable networks connects every continent except antarctica and imperative to maintainingsational security. i believe in protecting national interest is par rant specifically true since we know regulations exist in state and local levels. it would also prohibit any other noa authorization and future cables in marine sanctuary. ms. thooms, could you expand on the number of agencies and permits that both the federal and state level that are involved in permitting process for under siege cables? >> thank you for you question, question, i can. in terms of the types of permits we need to obtain -- there would be minimum of six federal agency that is would need to be part of that process whether through permits or through consultations. at the state level, of course, that would vary from state to state but i would say at minimum four, different resource agencies or and agencies would be involved in permitting these and because it's not all under water, it does -- they do land and planning departments that could get involved and that can be a handful of agencies and more depending

the cable network connects every economy except antarctica, they are imperative to maintaining nationalecurity. i believe finding the balance is paramount. this is especially true since we know that it already exists at state and local levels. unfortunately, special use permits and other requirements that are imposed on these cables and disrupted progress, which can ultimately lead to national security issues. noaa realized this and tried to release these costly regulations for two years. hr 261 would make it permanent noaa's decision to no longer require special use permits for submarine cables and a marine sanctuary. it would also prohibit any authorization for all existing future cables within the marine sanctuary. you note that the commercial undersea cables are part of the permitting process. could you expand on the number of agencies and permits at the federal and state level that would involve the process for undersea's cables? >> thank you for your question. yes, i can. in terms of the types of permits we need to obtain and how many -- again, i'm speaking of the u.s., on the fed

let's say antarctica. >> sorry, australia. >> this president's middle initial didn't stand for anythingichelangelo? >> no. >> the correct answer we're looking for is the venus. >> those are not celebrity questions. >> that's what i said. >> this is the daily double. >> okay. >> this supermodel graced both the 50th and 60th anniversary covers of the "sports illustrated" swim suit issue, and you're married to her. >> i think i know the answer. who is chrissy teigen? >> yeah! >> i told you he was brilliant. >> that was a celebrity question. >> john, thank you. >> everybody good in l.a. with the fires? >> we're fine. you know, some of our very good friends lost their homes. and, so, the whole city and the whole community is in mourning really. it was a tough time for all of us, but we did at the grammys to help raise money to support the people who lost things there. and we're going to do what we can to help rebuild. >> yeah. john, always good to see you, buddy. >> the best. >> oh, you are coming back with "jenna & friends," too? >> i will be back. i will see you all later. >> let's do some