A panel of experts choose an object they feel represents our relationship with nature.
Should half the earth be set aside for wildlife? Monty Don and panel of experts discuss.
Coral reefs are renowned for their beauty and diversity, but what is their future?
The lemurs of Madagascar are the most endangered mammals on earth - how can we help them?
Can we share the planet with migrating birds along the whole of their flight path?
Can we share the planet with wolves, or will we always want to remove them from our lives?
Can we share the planet with orangutans, and how can drones help us?
As east Africa gets hotter and drier will conflict between cattle and wildlife increase?
Are we being short-sighted when it comes to conserving long-lived species?
Can we share the planet with mangrove forest?