Is this mailbox worth $83,000?

Somebody thinks it is.

Blogger Carl Zimmer asked his readers to send in photographs of their science tattoos and produced the Flickr set below:

We all know what the Sun looks like, right?

Well not quite; the Sun is so bright that our eyes can’t cope with it and this washes out any detail. But there are different ways to look at the Sun.

Ultraviolet – 17.1nm

Ultraviolet – 30.4nm

Magnetism

A magnetogram maps the magnetic field – white areas have a strong magnetic field, black areas have a weak magnetic field.

Can liquids un-mix?

Usually when two liquids mix they tend to flow turbulently. In some situations however, they can undergo laminar flow, as shown in the video below.

It’s much easier to understand once you’ve watched the video.

The ozone layer protects the Earth from about 98% of the Sun’s harmful ultraviolet light.

Unfortunately, human use of chlorofluorocarbons (CFCs) has damaged the ozone layer and now, from September to December every year a great big “hole” (actually an area of low concentration) appears over the Antarctic.

You can track the damage to the ozone layer via NASA’s Ozone Hole Watch.