Becoming Earth: how our planet came to life

Rock. Intraterrestrials: how subsurface microbes alter the planet's crust ; The mammoth steppe and the elephant's footprint: how animals shape Earth's landmasses ; A garden in the void: how to bring the planet's soils back to life

Water. Sea cells: how plankton define the modern oceans ; These great aquatic forests: how marine vegetation makes the planet more habitable ; Plastic planet: how best to manage the plastic waste warping the ocean ecosystem

Air. A bubble of breath: how microbes influence weather and helped create a breathable atmosphere ; The roots of fire: how the coevolution of fire and life transformed the planet ; Winds of change: how to cut greenhouse gas emissions and preserve a livable world.