MAHO - The Mid American Health Organization

Less pesticides, Yay.

Strawberries are one of the most pesticide-intensive crops in America.

Keeping them free from mold, insects, and disease often requires repeated chemical treatments throughout the growing season. For decades, that has simply been accepted as part of growing the fruit.

Now a robotics company in California is trying to change that.

Instead of spraying pesticides, their solution uses light.

A company called TRIC Robotics has developed autonomous machines that move through strawberry fields after dark. The tractor-sized robots use UV-C light, a powerful form of ultraviolet radiation capable of damaging bacteria, fungi, and other harmful organisms that threaten crops.

The idea is surprisingly simple.

Many of the diseases that attack strawberries are vulnerable to UV-C light. By exposing plants to carefully controlled doses at night, farmers can reduce disease pressure without relying as heavily on chemical sprays.

The robots can cover up to 100 acres of farmland and are equipped with specialized systems that remove pest residue while avoiding damage to the plants themselves. Operating after sunset allows the treatment to work effectively while staying out of the way of normal farm operations.

That pink finger of light reaching upward from a thunderstorm is not lightning. It is something stranger, and for most of human history nobody knew it existed.

What you are looking at is called a sprite, a form of transient luminous event that occurs above thunderstorms rather than below them. While ordinary lightning discharges downward toward the ground, sprites fire upward into the upper atmosphere, sometimes reaching altitudes of 80 to 90 kilometres, approaching the edge of space itself.

Sprites last for only a few milliseconds, which is part of why they went undocumented until 1989, when a scientist accidentally captured one on video while testing a low-light camera. Pilots had reported seeing strange red flashes above storms for decades before that, but without photographic evidence the accounts were largely dismissed.

The blue glow at the base is called a blue jet, a separate but related phenomenon triggered by the electrical discharge of the thunderstorm below. The red tendrils reaching upward are the sprite itself, caused by the excitation of nitrogen molecules in the mesosphere by the electric field generated after a large lightning strike. The colors are not enhanced. That pink-red is what nitrogen looks like when it releases energy at those altitudes.

The atmosphere visible at the top of this image, glowing green, is airglow, a faint luminescence produced by chemical reactions in the upper atmosphere that occurs continuously around the entire planet. It is only visible from orbit or in long-exposure photography.

From the ground, you see lightning strike down. From the International Space Station, you see the full picture. The same storm is simultaneously firing energy downward into the Earth and upward toward space, operating on a scale that ground-level observation never reveals.

Thunderstorms are not just weather. They are planetary-scale electrical systems, and they are still showing us things we did not know were there.