Earth A record number of sea lions gather in San Francisco More than one thousand of the animals visited a city pier - the region's biggest spike in 15 years. New Zealand's city built on a labyrinth of lava caves Dam bursts and death toll rises in Brazil floods Future Earth: Sign up to our newsletter The gardeners allowing insects to eat their plants Future These tricks make wind farms more bird-friendly Future The women saving crumbling Tibetan monasteries Future WATCH Inside the Icelandic plant turning CO2 into rocks Climate solutions How I tempted a frog to live in our garden Future Future Planet These hungry insects chomp on plastic as food Wriggling critters armed with enzymes can break down plastics that would otherwise take decades, or even centuries to degrade. Future How Earth Day was born Earth Day emerged from the disquiet that many people felt at the destruction of the natural world and has evolved into a global environmental movement. Future World of Wonder This rare cicada emergence last happened in 1803 Two broods of cicadas have started emerging simultaneously for the first time in 200 years. It's loud, messy and very interesting. See more Video Alaska's melting glaciers that rip homes apart Qasa Alom meets a team conducting research on Alaska's changing environment. Weather & science Nasa reveals giant lava lake on Jupiter's volcanic moon New research suggests the fiery moon Io has been spewing lava for billions of years. Natural wonders Why giant hailstones are on the rise Although huge hailstones are still rare, there are signs that their frequency and size are increasing. Weather & science Listen to world's first 'chat' between humans and whales Scientists had a conversation with Twain, the humpback whale. It's the first ever recorded chat of its kind. Natural wonders England's 'largest gold nugget' discovered A metal detectorist has uncovered something pretty unexpected and highly valuable on farmland in rural England. Natural wonders Photos from the deep sea show 'exciting' new species Scientists exploring the ocean off the New Zealand coast believe they have discovered 100 new marine species. Natural wonders What 'zombie fires' are and why they pose a risk for Canada Over 100 fires in one province alone have been burning under the Canadian snow at an unprecedented rate. Weather & science Mesmerising life in the deep sea Explore depths where volcanic fluids meet near-freezing seawater, creating a dynamic clash below. Natural wonders What happens when it rains space debris A bus-sized satellite has become the latest piece to fall to Earth. How often does that happen? Weather & science Why electric vehicles struggle in extreme cold Freezing temperatures affect electric vehicles in two major ways. Watch to discover how and why. Weather & science The spongy creatures cleaning Zanzibar's oceans As ocean temperatures rise, women in Zanzibar turn to natural sea sponge farming to stay afloat. Sustainable business The race to fix clean energy's waste problem While wind electricity is clean, this green industry has a waste problem. Now there's a race to solve it. Climate solutions Giving fashion from upcycled scraps Want to gift sustainably, dress stylishly, and help the planet? Scraps might be the answer. Green living 'It's like being in a farm from outer space' Tech-loving traveller Paul Carter visits a new kind of farm - one that has to be accessed via an airlock. Climate solutions Japan's testbed for future sustainability How a project near Fukushima has become a lab for demonstrating sustainable ideas for Japan and the wider world. Climate solutions How to ship solar power from sea to shore One company is developing a new way of transferring energy from sea to shore, and it's all powered by the wind. Climate solutions The sacred birds of longevity revered in Bhutan The black-necked cranes are a revered species across the Himalayas. Weather & science How to live a zero-waste life in a wasteful world Living a zero-waste life is great for the environment and your wallet. How does it work? Green living South Africa's all-female ranger squad A day in the life of the Black Mambas. Climate solutions Intense beekeeping and wildfires are harming Turkey’s bees Turkey’s bee populations are dwindling due to intense beekeeping practices and wildfires. Green living Editor's picks Wounded orangutan seen using plant as medicine It is the first time a creature in the wild has been seen using a medicinal plant to treat a wound. See more More Earth Celebrations to mark arboretum's 150th birthday The park in Walsall opened to the public on 4 May, 1874. Birmingham & Black Country Hampshire & Isle of Wight: Saturday's Big Picture Showcasing the best images sent to us from around Hampshire & Isle of Wight. Hampshire & Isle of Wight Dorset Big Picture: Saturday's image of the county Showcasing the best images sent to us from around Dorset. Berkshire Big Picture: Saturday's image of the county Showcasing the best images sent to us from around Berkshire. Berkshire Oxfordshire Big Picture: Saturday's image of the county Showcasing the best images sent to us from around Oxfordshire. Oxford Island hosts photography show for first time The show features 59 photographs and 15 short films of wildlife taken in the Bailiwick of Guernsey. Guernsey Developer told to clear overgrown village footpath Walkers in a Devon village say neglect has made the footpath almost "impossible" to use safely. Devon Man addicted to collecting bird eggs is sentenced Daniel Lingham, 71, is sentenced again for illegally collecting thousands of wild eggs. Norfolk Government defeated in High Court over climate plans Activists argued that the plan for cutting emissions would not meet the UK's climate targets. Science & Environment