The wreck detectives race the treasure hunters

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Afternoon all, We're going on a race to the bottom… the bottom of the sea. To a shipwreck cemetery. The seas around Vietnam are stormy and have caught many a trading ship. Among the treasures found are the earliest milk jugs on their way to sell to 17th Century Europe (just as tea-drinking tea was becoming popular). A trawl of another ship brought up about a quarter of a million objects from what was probably a Chinese trading vessel. One wreck goes back as early as the 7th or 8th Century. On board were clay pots with lettering in Chinese, Arabic and what looks like Indian script too, as well as Stars of David. This is all evidence of some of the earliest global capitalists. So far, the archaeologists have been beaten to the treasure by fishermen who are skilled free-divers. So the race is on to see if the wreck detectives get there before the treasure hunters.

To another detective - an amateur detective called Mike. He is a moderator for a forum on Reddit. Members on the page discuss the case of Adnan Syed who was convicted 15 years ago for the murder of his teenage ex-girlfriend. Podcast Serial is looking at the case from every angle. Or so they thought.Mike heard in an early episode that a potential witness might have been able to provide an alibi for Adnan, because she claimed she saw him in a snowstorm. He went back to look at the National Weather Service data for that day, only to find there was no snow on that date.

We've been doing our own detective work - to try and work out why the US teen pregnancy rate has been falling. It seems people aren’t having less sex or more abortions. It's down to better use of contraception, but the reason why is still a small mystery. All we know is it doesn’t look like it’s down to sex education. We can tell that because the pregnancy rate has gone down in all 50 states even though what they teach differs across the states.

Meanwhile... A woman attempted to drive across Saudi Arabia Captchas are being replaced with a box to tick next to the words "I am not a robot" Gangam Style broke YouTube

That's it from us today.