NMDHS Marauders

The lifecycle of a G-type star, like the Sun. All original videos are copyrighted to NASA, NASA JPL/Caltech, and ESA.

On the physics and mechanics of a medieval trebuchet, a type of catapult, its design, working and optimization through improved simulation and mathematical analysis.

"Magnetohydrodynamics, or MHD, is a branch of the science of the dynamics of matter moving in an electromagnetic field, especially where currents established in the matter by induction modify the field, so that the field and dynamics equations are coupled."

Besides giving away to charity, most rich people waste their money on boring, frivolous things such as yachts, diamonds, and mansions. Here's a rich English guy that knows how to have fun. I hope he does build a bigger one. I would like to see a flying double-decker bus.

Curious about planets on other stars?

"In particular, rapid swings in the density of plants and fleas indicated the food web was unstable and about to change. The idea that such early warning signals ought to exist is not new - but the researchers say this is the first time it has been demonstrated experimentally. "For a long time, ecologists thought these changes couldn't be predicted," said research leader Stephen Carpenter from the University of Wisconsin in Madison, US. "But we've now shown that they can be foreseen. The early warning is clear; it is a strong signal.""

"A passive crossover has no active filters as were used in the electronic crossover. It uses coils (inductors) and capacitors to cause a rolloff of the audio level."

Determine the stability of your rocket by calculating the center of pressure - with spreadsheet example.

Reducedmass.com is a science blog updated daily. We blog about stories from all walks of science if they strike us as interesting. The biggest weight is on making the stories fun and not the usual dry writing style associated with science.

While there are many articles elsewhere that discuss passive crossover design, not all follow a scientific approach. There are several 'off-the-wall' designs scattered throughout the Internet that are a case in point, and unless there is real science described in any article you see, it is best avoided.

CARWeb - The Canadian Association of Rocketry

In this documentary, Professor Jim Al-Khalili sets out to uncover one of the great mysteries of science - how does a universe that starts off as dust end up with intelligent life? How does order emerge from disorder? It's a mind bending, counter intuitive and for many people a deeply troubling idea. But Professor Al-Khalili reveals the science behind much of beauty and structure in the natural world and discovers that far from it being magic or an act of God, it is in fact an intrinsic part of the laws of physics. Amazingly, it turns out that the mathematics of chaos can explain how and why the universe creates exquisite order and pattern.

CH'YEAH! CH'YEAH! BIIRACK! BIIRACK!

"Carolinian Canada is a unique ecosystem zone found in southern Ontario. The term 'Carolinian' refers to its similarity to the forests found in North and South Carolina in the southern United States."

"The animals found in the Carolinian forest are some of the most unusual in Ontario. In these relatively dark, closed in spaces, animals must adapt in ways that allow them to thrive."

Danielle, you may want to add better descriptions to your links so that you know what was found there.

"The upper layer of the world's ocean has warmed since 1993, indicating a strong climate change signal, according to a new study. The energy stored is enough to power nearly 500 100-watt light bulbs per each of the roughly 6.7 billion people on the planet."