During World War I, a youth organisation called the Order of Woodcraft Chivalry was set up, prompting similar groups attracting thousands of members.
Extreme weather will affect people and animals, as well as whole ecosystems. Research using satellites shows that ecosystems worldwide are vulnerable to collapse.
Australia may have reputation for vast areas of wilderness, but in reality the continent's ecosystems have been chopped and diced. Now we need to protect what's left.
In many parts of the world, Christmas and mistletoe are inextricably intertwined. But in the natural world, mistletoe has long fascinated naturalists and scientists.
Bat populations have been hammered by deforestation. Efforts like tree-planting schemes are a step forward, but they're doomed to fail unless we apply a bit more local knowledge.