Author: BBC Radio 4

The average rugby pack is much bigger than it was 20 years ago but has the growth finally plateaued? Living Blue Planet Index Populations of marine mammals, birds, fish and reptiles have declined by 49% since 1970, a report says. But what does this actually mean?

Striking numbers? Are the unions really on the rise again and holding the country to ransom?

The rise of the giants Are rugby players really getting biger and bigger?

Living Blue Planet Index Populations of marine mammals, birds, fish and reptiles have declined by 49% since 1970, a report says. But what does this actually mean?

Bean counter The Office for National Statistics is much maligned whether it's its data revisions, the fact that some of it statistics have been deemed not fit for purpose or that we still haven't worked out why UK productivity is so low. So George Osborne has launched a review of the economic statistics spewed out by the ONS to see where improvements can be made. Tim talks to Professor Sir Charles Bean who is conducting the review.

Banana Equivalent dose Following on from our revelation that bananas can't kill you even if you eat seven we look deeper into their radioactivity and the 'banana equivalent dose'.

Too dense Is population density the right measure to be looking at when working out how many refugees countries should take- and if not what is? How many bananas will kill you? There?s a belief among some people that too many bananas will kill you. Eat too many and you will overdose on potassium and die. But how many bananas would you need to eat?

Can you rely on non-voters During the election for the leadership of the Labour Party in the UK Jeremy Corbyn has whipped up unprecedented support among grass roots activists pushing him into a surprising lead. Bernie Sanders the left-wing Democratic candidate has done the same energised grass roots support in the United States in a similar way. Their supporters believe in both cases they can shake up the political mainstream and convince non-voters to turn out at the ballot box. But is this a wise strategy?

The latest on deaths for people admitted at a weekend? Reports suggested 11,000 are dying in hospital after being admitted at the weekend but what does the report actually say?

Too dense Is the UK already more densely populated than other places in Europe and is this a good argument against taking more refugees.

How many houses do we need? We're told that we need to build 200,000+ houses a year to meet housing need in this country. We talk to Kate Barker the woman who first came up with this number about where it comes from and what it means.

How many bananas will kill you? There's a belief among some people that too many bananas will kill you. Eat too many and you will overdose on potassium and die. But how many bananas would you need to eat?

Queuing backwards Britons love to queue, but have we been getting it wrong? Lars Peter Osterdal from the University of Southern Denmark discusses his theory of how to make queuing more efficient. Thinking Like an Engineer Engineer Guru Madhavan tells the story of the development of the barcode and argues that those making policy should ask engineers as well as economists about solving social problems. Presenter: Tim Harford Producer: Wesley Stephenson

Deaths of people 'fit for work' Thousands of people are dying after being declared 'fit for work' by the government according to the Guardian. The figures are from a long awaited freedom of information release from the Department for Work and Pensions. But do the figures actually tell us anything? More or Less investigates.

Sugar Sugar has had a pretty bad press over the last few months and seems to have replaced fat as the current 'evil' in our diets. We look at some of the claims that have been made about rotting teeth and the justifications for a sugar tax.

Zero-hours contracts The latest figures show a 20% rise - but does this really mean that more people are on zero hours contracts thab=n last year?

Queuing Backwards Britons love to queue, but have we been getting it wrong? Lars Peter Osterdal from the University of Southern Denmark discusses his theory of how to make queuing more efficient.

The Chinese Market Crash in context. How big is the market, how many investors does it have and does it tell us anything about the wider Chinese economy? Sprinters legs It may seem strange, but world class runners don?t move their legs faster than average park runner. That?s the claim anyway ? is it true and if so what is it that makes athletes like Usain Bolt and Justin Gatlin run so fast?

The Chinese Market Crash in context. How big is the market, how many investors does it have and does it tell us anything about the wider Chinese economy?

Eight Million Foreigners Are there really eight million foreigners in the UK?

What does 95% less harmful actually mean? E-cigarettes are 95% less harmful than ordinary cigarettes according to last week's report by Public Health England. But what does this mean? The number was arrived at using something called 'multi criteria decision analysis' so how does it work ? we ask the man who brought it to the UK, Professor Larry Phillips.

Thinking Like an Engineer Guru Madhavan from America's National Academy of Scientists lifts the lid on how engineers think and argues that those making policy should ask engineers as well as economists about solving social problems.

Sprinters legs It's may seem strange, but world class runners don't move their legs faster than average park runner. That's the claim anyway ? is it true and if so what is it that means athletes like Usain Bolt and Justin Gatlin run so fast?

Loop The ancient Greeks saw magic in the geometry of an ellipse and now mathematical writer Alex Bellos has put this to use in a specially designed table for a specially designed game of pool. Premier League predictions If a martian came to earth wanting to know where each team would finish in the English Premier League this season where should he go to get the most accurate prediction?