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An AFM image of an iron trimer next to an iron dimer on Cu (111). Image provided by Franz Giessibl, University of Regensburg, Regensburg, Germany.

An AFM image of an iron trimer next to an iron dimer on Cu (111). Image provided by Franz Giessibl, University of Regensburg, Regensburg, Germany.

Low temperature SEM magnification series for a snow crystal.   8 images of a snow crystal continually zoomed in until 36000x...Amazing

Low temperature SEM magnification series for a snow crystal. 8 images of a snow crystal continually zoomed in until 36000x...Amazing

The world's favourite particle is proving far too well-behaved for physicists' liking. The first major update from the Large Hadron Collider since a particle resembling the Higgs boson was discovered in July rules out one way in which the boson might open the door to new physics, and weakens another.

The world's favourite particle is proving far too well-behaved for physicists' liking. The first major update from the Large Hadron Collider since a particle resembling the Higgs boson was discovered in July rules out one way in which the boson might open the door to new physics, and weakens another.

Supersonic Shock Wave
When an object moves faster than the speed of sound, funny things start to happen. The bullet in the image above is moving so fast, the air in front of it can’t get out of the way quickly enough. So it starts to pile up in front of the bullet, forming an area of compressed air — a shock wave.

The same thing happens with supersonic jets. As they fly faster than the speed of sound, they build up a shock wave in front of them. The sonic boom that accompanies these…

The Weird and Beautiful World of Fluid Dynamics

Supersonic Shock Wave When an object moves faster than the speed of sound, funny things start to happen. The bullet in the image above is moving so fast, the air in front of it can’t get out of the way quickly enough. So it starts to pile up in front of the bullet, forming an area of compressed air — a shock wave. The same thing happens with supersonic jets. As they fly faster than the speed of sound, they build up a shock wave in front of them. The sonic boom that accompanies these…

The silent spread of sexually transmitted infections (STIs) Nearly half a million people in the UK are diagnosed with a sexually transmitted infection (STI) every year. However, the number of actual cases is likely to be far higher as STIs can often be passed on unwittingly.

The silent spread of sexually transmitted infections (STIs)

The silent spread of sexually transmitted infections (STIs) Nearly half a million people in the UK are diagnosed with a sexually transmitted infection (STI) every year. However, the number of actual cases is likely to be far higher as STIs can often be passed on unwittingly.

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