We're marking the 40th anniversary of Earth Day. That's a little embarrassing considering our 4.5 billion-year-old planet has been so hospitable.
In spring, migrating geese face the fickle elements that can make or break a journey north.
Nature writer Roger Deakin considers wood as a vital element of life.
Scientists recognize that species cannot be managed in isolation; management must be based ecosystem-wide – including earth and sky.