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Ice shelves collapse the past two decades and this appears to be ready to go with the breaking off of the major iceberg, that is hard to attribute you to anything else. >> reporter: for nowgists will track the new -- for now, scientists the track the new iceberg to see if and when it melts. maps will have to be redrawn for the ever-changing geography in antarctica. kyung lah, cnn, los angeles. let's check on cnn "money stream" this morning. global stock markets higher after the fed chief, janet yellen, after her capitol hill testimony sent wall street to new record highs. she signaled the fe...

That boosted bond prices and stocks with the dow closing at an all-time high. the rally could keep going as investors gear up for second-quarter earnings. right now, futures are higher. companies are making money. it is, of course, how much money companies make that drives stock market values. the data of six million verizon customers has leaked on line. that includes phone numbers, names, and some pin codes. the company says the breach was caused by a problem with its cloud server and has been -- since been closed. verizon also says there was no theft of consumer information. however, secur...

The u.s. should also require p.i.n. codes. >> they're taking a half step towards a technology known as chip ensignature. the p.i.n. is a critical element of security and it's been proven to reduce trafraud in europe. >> reporter: what should i do if i haven't yet received a new card? in fact, 60% of americans haven't yet received their new card. don't worry, it should arrive by the end of the year. meanwhile, you can still use your existing credit card with a magnetic strip. you can always contact your bank about when the new card might arrive. question four. if my credit card details are stol...

By today, or else they will bear the cost of in he credit card fraud. so there's an incentive. you though, we're all used to just swiping our credit cards with a magnetic strip like that. you could still do that. but the new way to ensure security is to insert your card with that computer chip up, and it will take about ten seconds or so. so don't forget to pull your card out when you leave. but a lot of people have a lot of questions. so we thought we'd go through them one by one. question one. why are the banks rolling out the new cards? it's part of a massive upgrade against credit card fra...

Order to pay. >> you create an incentive for someone to figure out how to copy your fingerprint. adam's company offers fingerprint security. adam says that while fingerprint scans are convenient, once hacked, they can't be changed like passwords or pin codes. >> once i have that, i have your fingerprint for the rest off your life. >> reporter: the new technology opens the door for new threats from hackers. >> if history has shown us anything, they will find a way to attack one single point just like they've just brutalized passwords across almost every enterprise. >> reporter: this brave new w...