Sailing on a sulfurous sea - February 27, 2009

The first survey of emissions from commercial shipping has shown them to be big dirty beasts. Daniel Lack from the National Oceanic and Atmospheric Administration (NOAA) measured emissions from ships in the Gulf of Mexico, Galveston Bay and the Houston Ship Channel. He estimated from this that globally ships emit 0.9 teragrams of particle pollution annually. (Press release)
But the resulting effect on the climate seems confusing. As reported by Bloomberg, the particulates, including sulfates, organics, cloud condensation nuclei, that commercial carriers spew out act to cool the atmosphere. This effect, the authors say, outweighs the warming effect of ships’ carbon dioxide emissions five-fold. (Bloomberg story).
Lack looked at differences between newer, cleaner low-sulfur fuel and the standard high-sulfur fuels. Sulfur makes up half of the particulates. “Fortunately, engines burning ‘cleaner,’ low-sulfur fuels tend to require less complex lubricants. So the sulfur fuel regulations have the indirect effect of reducing the organic particles emitted,” said Lack’s co-author James Corbett from the University of Delaware.
Last year, the greenhouse emissions of ships were revealed, and Nature has also reported on what the future of shipping might look like (pretty PDF, subscription needed).
Shipping has been a little overlooked so far in global environmental budgets, but here is yet more evidence that ships are major sources of pollutants. (That is, of course, unless they all switched to using giant kites to propel themselves.)
Image: NOAA

There is much excitement – and no small number of puns – greeting the news that ancient footprints found in Kenya show our distant ancestors were striding around on feet very like ours some 1.5 million years ago.
If you were an arms manufacturer – sorry “global defence company” – would you sponsor a science event called ‘The Big Bang’?
Cross posted from 
The US Food and Drug Administration has accused India-based drug manufacturer Ranbaxy of falsifying data in both approved and pending drug applications.
Social aphids Nipponaphis monzeni show a remarkable dedication to the upkeep of their homes.
After John McCain’s
The ‘freaky flat-faced fish’
Posted for David Cyranoski
You can’t put it much more succinctly than the excellent
India is following up its Chandrayaan-1 lunar mission with a billion dollar plan to put astronauts into orbit.
Pope Benedict XVI praised genetic science at a conference at the Vatican on Saturday.
Lucky American readers can now get an instant carbon-guilt trip, all courtesy of Google and NASA.
The 



This exotic green comet, named 

A group of UCLA scientist think they may have answered a question that has baffled the most powerful military machine on Earth: where is Osama bin Laden?
GlaxoSmithKline is to slash drug prices in the world’s poorest countries and reinvest profits made in less developed countries into hospitals and clinics, according to company chief executive Andrew Witty.
Nature reporters are still at the American Association for the Advancement of Science meeting in Chicago. Here are some recent dispatches from the science news front line. Full coverage is over on our
Posted on behalf of Roberta Kwok
A small, rabbit-like animal in US may soon have something in common with the polar bear.


If you’ve not had
A burst of genetic changes occurred around 10 million years ago in one of the ancestors we share with chimpanzees, with consequences that are being felt today.
It's a scenario that space analysts have forecasted for years: With thousands of satellites in orbit, sooner or later two had to collide.
Around 400 cities across Europe have
Sanofi-Aventis’s new CEO, Christopher Viehbacher, made his debut today to
A University of Portsmouth, UK, palaeontologist says he's discovered 48 new species of prehistoric creature, including 8 dinosaurs, in just four years, which must be some sort of record.

If you haven't had enough Darwin yet, here are some more tidbits.
Posted for Emma Marris
You might think that if/when the huge ice sheet in West Antarctica melts, sea levels around the world will rise by roughly the same amount everywhere. You’d be wrong.
Geochemists have found evidence of animals living on Earth at least 635 million years ago – nudging back the oldest fossil records by tens of millions of years. Their research is published in this week’s 
Posted for Olive Heffernan
Pity Dow Chemicals.
Physicists report [
Climate guru James Hansen says he will scale back his dealings with the media in the wake of his comments about airport expansion.
Posted for Emma Marris
Thanks Google, now I’ve got that annoying song
America is getting a new university. A rather strange sounding university.

Celebrity-obsessed UK newspaper the Guardian has wheeled out its big-hitting serious journalists today for an expose of tax avoidance and ‘offshoring’. In some potentially morally dubious (but likely entirely legal) tax-related cleverness it seems AstraZeneca and GlaxoSmithKline have shifted the ownership of some of their trademarks to low-tax countries.
It’s groundhog day, but spare a thought for the 
The folks repairing the Large Hadron Collider have spotted 