28 million years ago — Cannabis evolves on the eastern Tibetan Plateau.
5,000 years ago — Farmers in Central Asia grow hemp for the purposes of making rope, clothing, and paper.
2,500 years ago — Ancient Chinese practitioners incorporate cannabis with high levels of THC in funeral rituals using hot stones and wooden bowls.
1,000 years ago — Hash-infused confections made with dates and spices become popular in India and the Middle East.
400 years ago — American colonists in Jamestown grow hemp to support colonial expansion.
200 years ago — Hash-infused sweets and candies become popular in America.
170 years ago — Medicinal cannabis tinctures and other preparations spring up in American pharmacies.
120 years ago — CBN is the first cannabinoid to be isolated.
84 years ago — US authorities wage war on cannabis consumption, releasing the famously nonsensical propaganda film Reefer Madness.
83 years ago — Cannabis prohibition officially begins on a national level with the passing of the Marihuana Tax Act of 1937.
56 years ago — Israeli chemist Dr. Raphael Mechoulam isolates THC for the first time.
51 years ago — Cannabis is classified as a Schedule I drug under the Controlled Substances Act.
30 years ago — Molecular biologist Lisa Matsuda proves the human body has cannabinoid receptors that allow cannabis consumers to get high.
24 years ago — California becomes the first American state to legalize the medicinal use of cannabis.
8 years ago — Colorado and Washington become the first American states to legalize the recreational use of cannabis.
4 years ago — LEVEL is founded, and consumers have new ways of unlocking the benefits of cannabis. Modern cannabis consumption is born.