Weather
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Extremely rare 'rainbow clouds' light up Arctic skies for 3 days in a row
By Harry Baker published
In and around the Arctic Circle, stunning multicolor clouds have been shining in the sky for days on end. It is very unusual to see so many of these vibrant clouds over such a long period.
Controversial study suggesting ozone hole isn't recovering is skewed by bad data, experts say
By Harry Baker published
A new paper claims that the ozone hole above Antarctica is getting deeper, suggesting that it is not healing as expected. However, other researchers say the study's results are misleading.
Big blob of hot water in Pacific may be making El Niño act weirdly
By Sascha Pare published
El Niño is in full swing and will likely remain "strong" this winter, but its effect on weather patterns in the U.S. depends on the behavior of an unusually warm blob in the western Pacific, experts say.
How big can snowflakes get?
By Jennifer Nalewicki published
What is the largest snowflake ever recorded?
El Niño could unleash several '10-year flood events' this winter in cities such as Seattle and San Diego
By Ben Turner published
Climate change and rising sea levels could cause similar floods along the West Coast each year without El Niño by the 2030s, NASA warns.
Rare lake forms in Death Valley
By Jennifer Nalewicki published
There's still time to see a rare oasis that formed in Death Valley.
Amazon's 'flying rivers' of vapor are drying up in an unprecedented drought. Here's how to save them.
By Lucas Ferrante published
A record drought, combined with a strong El Niño, is wreaking havoc on the Amazon. If steps aren't taken to curb illegal mining and deforestation, the ecosystem could collapse.
A strong El Niño is coming this winter. What does that mean?
By Aaron Levine published
Thanks to El Niño, meteorologists are predict a snowy winter in the Rockies, storms and wet weather in the South and drier conditions in the Northwest and Uppder Midwest.
'One of the biggest on record': Ozone hole bigger than North America opens above Antarctica
By Harry Baker published
Satellite data shows that this year's ozone hole grew to around twice the size of Antarctica. Researchers say the eruption of Tonga's underwater volcano early last year may be partially to blame for the enormous cavity.
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