For 2D or 3D Cartesian coordinate systems, there are simple formulas based on the Pythagorean theorem that allow one to calculate distance between two points. But what if the surface is curved, like that of the Earth? In other words, how do you get the shortest distance between two cities ? Instead of x and... Continue Reading →
I found a little surprise this morning when I headed towards the compost bin. Its lid and sides were covered with maggots. It was a reminder that flies lay eggs if the right smell triggers them to do so, even if there's an obstacle between the potential food source and eggs. The latter eventually turn... Continue Reading →
Birdsfoot trefoil is an attractive relative of a familiar group of species of clovers known as Trifolium, which includes red, white, Swedish, Dutch and nearly 300 other species. Like clovers, it is a useful plant. While it grows on roadsides, it helps control erosion. It feeds both wild animals (geese, deer and elk) and domestic... Continue Reading →
