Santa's reindeer must navigate through approximately 1,900 cyclones per year in the Arctic.
As the saying goes, each snowflake is different. And chances
are that saying is right! Anthony and Laci join up to tell you how
snowflakes form, and why each one is so unique.
The West Antarctic ice sheet appears to be shedding far more ice than a few years ago.
The banning of ozone-depleting chemicals hasn't yet caused detectable improvements in the Antarctic ozone hole.
Recent research discovered that the chemical,
perfluorotributylamine (PFBTA), insulates the planet 7,100 times more
effectively than carbon dioxide.
The trail of twisted metal and torn roofs left behind by
massive twisters is growing longer and wider, a sign that tornadoes may
be growing stronger.
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