1 - How many ice ages have there been in the past 150,000 years?
two
2 - About how cold does it get during an ice age?
about -15ºF below average.
3 - How long are the ice ages (approximately)
about 20,000 years
4 - How long are the interglacial periods?
about 35,000 years
5 - How many big volcanic events have there been in the past 150,000 years?
three.
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