The Australian government will now accept licence applications for groups wanting to grow cannabis for scientific and medical purposes. But there's still a lot we don't know about this complex plant.
With restrictions to cannabis loosening at the state level, research is badly needed to get the facts in order.
A new study found that people who are high on cannabis are less likely to opt for a task with a larger reward if the task requires more effort.
147m people used the drug last year. We need to know much more about it.