One group of sloths made the quite unlikely shift to water, possibly because of a drying environment in the Miocene. This clever paper shows how they coped with a marine life, just like early whales, by adapting their bone compactness. Our pygmy sloths on the Panamanian island of Isla Escudo de Veraguas are the most recent speciation, around 9,000 years ago. These guys were several species on a sea trip!

We have enough pollutants already, but 4 newly-discovered ozone-destroyers could be the most dangerous yet, if we can’t find where they come from.

It's hard to compare the lives of those people we call women in different parts of the world. Liberation has been achieved and yet, in some nations, it certainly hasn't. What to do? Well, let's make our opinions felt and heard and let’s do it today!

Are you interested in ''how cities can contribute to the advancement of sustainable development and address issues including water, energy and waste?'' Think you could write 500-600 words on the topic?

Masdar is launching its annual global sustainability debate at ADSW again. The blogging contest will appeal to a very wide range of people, focussing on cities and sustainable development.

The deodorant story progresses with a natural solution that has no aluminium or other ''contaminant'' to cause you any allergies or discomfort. Rubbing this in your skin could solve any BO problems!