Why Animals Migrate

The humpback whale migrates up to 16,000 miles every year, from polar regions to tropical waters and back.

Humpback whale migration routes.

The arctic tern migrates over 44,000 miles every year, from the arctic to antarctic and back.

Bird migration routes. 1-Northern Wheatear, 2-Bluethroat, 3-Eastern Yellow Wagtail, 4-Dunlin, 5-Wandering Tattler, 6-Bartailed Godwit, 7-Arctic Tern, 8-Sandhill Crane, 9-Brant, 10-Smith's Longspur, 11-American Golden Plover, 12-Tundra Swan, 13-Semipalmated Sandpiper.

These are just two examples of the incredible migrations performed on earth every year.  What could possibly motivate these animals to do this?  Well, the exact reasons are slightly different for every migrating animal, but a unifying theme can be found in the video below.  This is a video of "Net Primary Production", which is essentially a measure of the growth of plants.

"Weed Science" or "Activation Explained!!"

This is the chemical structure of tetrahydrocannabinol (THC), the main psychoactive substituent of weed:

If I were to make THC in the lab, this is how I would do it (please don't be freaked out by all the chemical structures, they aren't completely necessary to understanding this story, but I find they help):

Looks pretty easy, right?  haha!!!

Plants however, make THC like this (ref):

Notice that there is an extra COOH group on the THC when the plant makes it. This difference is critical to understanding why people use weed the way they do.