imagine the most profound
Ice Age you can think of
temperatures plummet to below zero even
at the equator before long ice encloses
our entire planet research suggests that
this may have happened not once but
three times in our planets past
welcome to snowball earth a snowball
earth is certainly the most extreme
climate change we can conceive the earth
having ever experienced what would
happen if the world froze over today
massive glaciers creep from the poles
crushing everything in their path first
of all the Canadians are going to have
to dig much deeper holes when they go
ice fishing next the governors of
Washington Idaho Montana North Dakota
Minnesota and Michigan and Maine will
probably declare federal emergencies
cities grind to a halt powerlines
collapse and water supplies freeze cars
won’t start roads are cut off by ice
building strain and crumble under deep
drifts of snow
everything is entombed our frail bodies
struggle to survive I think human
society would collapse if a snowball
earth happened again the oceans freeze
over fish die and marine ecosystems
collapse our food supply becomes
exhausted any surviving humans are
trapped in an icy hell we would have a
mass die-off of humans simply because we
could not grow enough food under these
conditions
incredible though it may seem the Earth
may have frozen over completely
scientists are finding clues in
unexpected places the story begins with
a mystery in the arid Flinders Ranges in
southern Australia layers of ancient
rock hold unusual stones these stones
are foreign to the area they are known
as drop stones the drop stones are
embedded in an ancient sedimentary sea
floor that formed around six hundred and
fifty million years ago Tim Raab a
geologist at the California Institute of
Technology hunts for these drop stones
at the Flinders range
this is an example to drop stone a piece
of ancient rock that was dropped into
the ancient mud on the sea bottom these
drop stones are visibly different from
the sedimentary bedrock around them
something powerful must have carried
them here but what Dan Schrag professor
of Earth and Planetary Sciences at
Harvard University believes the answer
is glaciers he actually have ice cubes
here that we’ve made with pieces of sand
and gravel in them so this these ice
cubes are like the glaciers that are
taking rocks from the land and then when
we put them in the water they’ll
actually melt and the sand and gravel
will fall to the bottom just like the
drop stones on the ocean floor these
drop stones are evidence that at some
point this area was covered in a thick
layer of ice
you
Ice Age you can think of
temperatures plummet to below zero even
at the equator before long ice encloses
our entire planet research suggests that
this may have happened not once but
three times in our planets past
welcome to snowball earth a snowball
earth is certainly the most extreme
climate change we can conceive the earth
having ever experienced what would
happen if the world froze over today
massive glaciers creep from the poles
crushing everything in their path first
of all the Canadians are going to have
to dig much deeper holes when they go
ice fishing next the governors of
Washington Idaho Montana North Dakota
Minnesota and Michigan and Maine will
probably declare federal emergencies
cities grind to a halt powerlines
collapse and water supplies freeze cars
won’t start roads are cut off by ice
building strain and crumble under deep
drifts of snow
everything is entombed our frail bodies
struggle to survive I think human
society would collapse if a snowball
earth happened again the oceans freeze
over fish die and marine ecosystems
collapse our food supply becomes
exhausted any surviving humans are
trapped in an icy hell we would have a
mass die-off of humans simply because we
could not grow enough food under these
conditions
incredible though it may seem the Earth
may have frozen over completely
scientists are finding clues in
unexpected places the story begins with
a mystery in the arid Flinders Ranges in
southern Australia layers of ancient
rock hold unusual stones these stones
are foreign to the area they are known
as drop stones the drop stones are
embedded in an ancient sedimentary sea
floor that formed around six hundred and
fifty million years ago Tim Raab a
geologist at the California Institute of
Technology hunts for these drop stones
at the Flinders range
this is an example to drop stone a piece
of ancient rock that was dropped into
the ancient mud on the sea bottom these
drop stones are visibly different from
the sedimentary bedrock around them
something powerful must have carried
them here but what Dan Schrag professor
of Earth and Planetary Sciences at
Harvard University believes the answer
is glaciers he actually have ice cubes
here that we’ve made with pieces of sand
and gravel in them so this these ice
cubes are like the glaciers that are
taking rocks from the land and then when
we put them in the water they’ll
actually melt and the sand and gravel
will fall to the bottom just like the
drop stones on the ocean floor these
drop stones are evidence that at some
point this area was covered in a thick
layer of ice
you
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