Mysterious swarms of dragonflies descend on California as experts reveal what is fueling invasion

More from Science & Technology

• Noah's Ark mystery deepens as new scans show boat-shaped formation is more than just rock

• Tropical Storm Moke erupts near Hawaii as hurricane-battered state braces for life-threatening floods

• Earthquake swarm rocks active California volcanic region as scientists watch for eruption signs

• Are we living in Aliens? As the movie celebrates its 40th anniversary, scientists reveal what the cult film got right…and wrong

• UFO 'that looked like a giant nuclear weapon' stalked me before disappearing into sea, says NASA scientist

• The dark side of viral cat videos: Behaviours deemed cute or funny are actually signs of feline distress, study warns

• Vatican performs ancient ritual with 1,700-year-old skull that divides Christians

• The Alps are crumbling: Climbers face deadly risk as Europe's scorching summer triggers record rockfalls - with Mont Blanc the worst hit, scientists warn

• The Grand National of the future? Chinese startup unveils a huge ride-on robot horse

• What colours do you see? Mind-boggling optical illusion tricks your brain into seeing red and blue in a black and white spinning wheel

• You're never too old to party! Clubbing boosts wellbeing for middle-aged women, study finds

• Europe's never-ending scorching summer: Timelapse reveals the vast swathes of the continent that have hit 40°C over the last four months

• Tornadoes threaten millions in major commuter zone as Americans are warned to find shelter

• Physicist's chilling end-of-world prediction is just months away

• Gruesome discovery at bottom of Lake Mead as water level reaches record-breaking low

• SpaceX has scarred the moon forever: Before-and-after images reveal how Elon Musk's out-of-control rocket carved a 60-foot crater into the lunar surface

• Ancient message discovered in Egypt offers new proof of the Bible's story of Moses

• Farmers' Almanac releases winter weather predictions warning millions to brace for heavy snow

• Why your tap water might taste 'musty' this week, according to scientists

• Charles I's lost treasure wreck has finally been found: Royal ship carrying millions in silver and gold is discovered in a Scottish river after 400 years