The northernmost and southernmost trees

Where are the northernmost and southernmost naturally-growing trees in the world? I thought it would be easy to find the answer, but it turn out, not so much. Northernmost The northernmost trees are most certainly Dahurian larch (Larix gmelinii) trees growing in north central Russia. They are apparently somewhere in the marked region below, or … Continue reading The northernmost and southernmost trees

Simple classification of radioactive decay

In how many different ways can an isolated neutral non-exotic atom decay? When an atom decays, it spontaneously changes into something else. That "something else" is inevitably two or more particles, none of which is the same kind of atom as the original. I also need to also explain what a "kind of atom" is. … Continue reading Simple classification of radioactive decay

Survey of MacPaint brush patterns

MacPaint is a paint program for early Macintosh computers. You can see it, and try it out, at the Internet Archive: <https://archive.org/details/mac_Paint_2&gt;. Its native image file format is very limited, and very obsolete. But a large number of MacPaint files were created, back in the day, and some of them can still be found. For … Continue reading Survey of MacPaint brush patterns