Earth Matters

World's largest dinosaur footprint shows just how enormous these beasts were

Tasmanian tiger 'sightings' prompt new scientific hunt

Rare Florida panther kittens spotted outside known breeding range

In baby otter's first try, water is no fun

12 amazing images of Jupiter

Take a flight through the aurora australis

650-year-old Polish oak is Tree of the Year

Say hello to the 11 new cloud atlas inductees

New breeding area in Bolivia offers hope for wild macaws on the brink

9 famous mirages that play tricks on the eyes

How you can help bluebirds bounce back

Where are Earth's largest nature reserves?