Americans in three states told to close windows NOW as lung-penetrating toxins fill the air

More from Science & Technology

• Missing nuclear lab worker's daughter reveals disturbing twist in case as police discover body in the woods

• Scientists issue first-contact plan as they await message from alien civilization

• Super El Niño is inching closer: A swell of warm water HUNDREDS of miles wide has arrived in the Pacific Ocean, NASA reveals - hinting the rare climate event is imminent

• The REAL Pirates of the Caribbean: Scientists discover three shipwrecks with 'all the signs of pirate mischief' off the coast of the Bahamas

• The 'Son of Concorde' is about to take to the skies: NASA readies its $247 million supersonic jet that replaces the loud sonic boom with a softer 'thump' and can travel from London to New York in under 4 hours

• Back to the future: 'Spooky' 62-year-old time capsule discovered in a London park tells the finder to back a horse running in this weekend's Derby

• Las Vegas struck by house-shaking earthquake as thousands are left rattled

• Masturbation in birds is 'natural', scientists say - with avians often using toys and twigs for self-pleasure

• The mystery meat in your takeout: One in four UK takeaways use the wrong ingredients in their dishes - including 'lamb' curries made with beef, and chicken masquerading as 'pepperoni'

• 'Ominous blob' spotted in Gulf of America threatens multiple US states

• Swarms of 'killer mosquitoes' released on innocent Americans reveal secret Pentagon files

• Mysterious triangular aircraft spotted over Area 51 sparks secret tech theories

• The football emoji has had a makeover! Classic black and white design is replaced with a colourful ball ahead of the World Cup

• The ominous sign a SUPER El Niño is inching closer: Satellite image reveals how large areas of the Atlantic Ocean are 5°C hotter than usual - suggesting the unusual climate event could be imminent

• Shocking twist after America's top exorcist claims UFOs are actually demons

• Flesh-eating parasite that devours victims alive detected in US for first time in 60 years

• Who will win the World Cup? Scientists calculate the chances for all 48 teams - with Spain the clear favourites to take home the trophy

• Millions of people hear a constant hum they can't explain - now scientists know why

• The taste of the afterlife: Scientists make sourdough BREAD using yeast collected from Otzi the Iceman's mummified body - and say it's 'really good'

• Should you sleep naked or in pyjamas? Scientists finally settle the debate