Landmarks and homes will turn their lights off for Earth Hour, 8.30pm-9.30pm local time, on Saturday 19 March.
These are the themes for Earth Hour around the world, as well as fun events to help protect it.
First seen in the UK in 2011, the caterpillar eats its way through box plants.
Infanticide plays a big role in a young monkey's development, as the threat of death makes them grow up.
The eaglet's parents are known as Mr President and The First Lady.
Scientists plan to capture CO2 and create a new building material, reducing carbon in the atmosphere.
Rock paper scissors players act without logic,and let emotions get in the way after losing a round.
A device that finds the 'smoking gun' of nuclear tests has been developed.
Bottlenose dolphins seem to play with their food, as mothers teach their young to kill their prey properly.
Earth Hour is marked every year in March to raise awareness of climate change.
Female animals may fend off unwanted intention by developing less attractive appearances.
What we have learned so far about Pluto from New Horizons mission.
AFP photojournalist Olivier Morin spent 10 days photographing surfers in the freezing water off the Lofoten archipelago, and was rewarded with several sightings of the northern lights (aurora borealis).
Modern technology has calculated the height of Ben Nevis more accurately.
Were Jesus' hands nailed to the cross, or were they tied with rope?
Reports of ministers considering a plastic bag-like tax on plastic-lined coffee cups.
Guantánamo Bay could be converted into marine research centre in the battle against climate change.
An incredible 52 new stars have been identified in the Tarantula Nebula
The Torlonia collection comprises 620 statues and sculptures.
Scientists discover how to filter one of the most difficult radioactive elements from nuclear waste.
Queen Nefertiti may be buried inside one of the hidden chambers within Tutankhamun's tomb.
Plants acclimatise to warmer temperatures, so the carbon they release from respiration is less than thought.
The Tully Monster was probably a vertebrate, similar to the jawless fishes we know today.
Scientists find way to turn Florida's huge quantities of waste tomatoes into power.
Motion of bright spots on surface of dwarf planet Ceres detected by ESO telescope.
In their quest to better understand the sun's magnetic field, Nasa scientists have created a new model.
South Korea meteorological agency detects 2.2 magnitude tremor in North Korea.
One of the world's most noisy marine animals could become much quieter with ocean acidification.
A black hole has been seen with red outbursts as it consumes a star quickly, and propels its pieces outwards.
Eight black granite statues reaching up to 2m in height discovered a Theban necropolis.