The concept is simple. You play a shining, heroic yellow ball who launches through space and collects the various coins peppered throughout the game's 100 levels. To do this, you'll need to use the [Left] and [Right] arrow keys to set your angle, and press [Up] or [Down] to adjust your force, all of which can be seen in the panel at the bottom of the screen. (Alternately, if the [arrow] keys aren't your thing, you can type in these numbers manually in their respective boxes, or drag the gauges with your mouse.) Once you're satisfied, it's time to hit the [Space] bar to fly towards the goal point in each stage. Of course, nobody ever said gravity was easy to deal with. The bigger the object, the stronger the pull it'll have, and the more force you'll need to be able to break free, rather than smashing into it, thus putting an early end to your lucrative career in space coin scavenging. You'll encounter a number of obstacles, such as red planets that repel you and blue planets that will draw you in.

Each stage in Crayon Physics Deluxe features at least two objects: a ball and one or more stars. Your goal is to move the ball to collect the stars and finish the stage. It's that simple. Using the left mouse button you can draw using crayon-style lines. Click, drag, and when you release, the shape you made comes alive and is given mass. You can draw wild shapes, plain shapes, lines, hearts, stars, bacon, monkeys, and everything in-between, it all interacts using realistic physics. You can even build rudimentary machines that are powered by gravity, attach shapes using hinges, and give the ball a little boost by clicking on it. Don't let typical gaming conventions limit yourself, as creativity is the key to enjoying Crayon Physics Deluxe.

The First World War Poetry Digital Archive and the Learning Technologies Group at Oxford University have collaborated on an exciting new project in the 3D virtual world Second Life to simulate areas of the Western Front 1914-18. The team believes this is the first time anything of its type has been done on Second Life. This project, which is funded by JISC, has arranged a range of digitised archival materials like poetry manuscripts, letters and diaries from the major poets of the First World War including Wilfred Owen, Isaac Rosenberg and Vera Brittain, along with contextual primary source materials. These materials have been supplemented with new interpretative content and a spectrum of interactive tools and tutorials, streaming video and audio effects.

n February 2008, Karen Armstrong won the TED Prize and called for the creation of a Charter for Compassion to bring together people of different religions and moral codes in a powerful common cause. The Charter launches November 12, accompanied by thousands of self-organized events, services and sermons. To help prepare the way, today on TED.com we offer six talks from six perspectives. Be ready for a surprise. Compassion is not the soft, fuzzy notion you might expect. Indeed, it might just be the best idea humanity’s ever had.

The International Day of Peace, observed each year on 21 September, is a global call for ceasefire and non-violence. This year the Secretary-General is calling on governments and citizens to focus on nuclear disarmament and non-proliferation. On 13 June 2009, Secretary-General Ban Ki-moon launched a multiplatform campaign under the slogan WMD – We Must Disarm to mark the 100-day countdown which lead to the International Day of Peace on 21 September.

The only existing film images of Anne Frank have been loaded on to YouTube by Amsterdam museum the Anne Frank House.The footage, from 1941, is the only time Anne has been captured on film. The 20-second footage uploaded to the museum's recently launched Anne Frank Channel shows Anne's neighbour on her wedding day. A 13-year-old Anne is seen nine seconds into the video, leaning out of a second-floor window to get a better look at the bride and groom.