[Music]
[Music]

welcome to rainy day story time with
welcome to rainy day story time with

minute physics today's book is how did
minute physics today's book is how did

wales get so big by minute earth before
wales get so big by minute earth before

we begin i just want to say this is a
we begin i just want to say this is a

great book for both kids and adults it
great book for both kids and adults it

is a collection of questions and answers
is a collection of questions and answers

about our natural world it's a great
about our natural world it's a great

coffee table book or bedtime book that
coffee table book or bedtime book that

you can just skim through and read one
you can just skim through and read one

little chapter or story or you can go
little chapter or story or you can go

through the whole thing from cover to
through the whole thing from cover to

cover if you'd like today we're going to
cover if you'd like today we're going to

be reading from the first question of
be reading from the first question of

the book where did earth's water come
the book where did earth's water come

from
from

unlike every other planet in our solar
unlike every other planet in our solar

system earth's surface is 70 liquid
system earth's surface is 70 liquid

water that's useful for sustaining life
water that's useful for sustaining life

but it's also weird because our planet
but it's also weird because our planet

didn't start off with water the early
didn't start off with water the early

inner solar system was far too hot for
inner solar system was far too hot for

frozen water and any water vapor would
frozen water and any water vapor would

have been blasted away by the solar wind
have been blasted away by the solar wind

so how did we end up with such splendid
so how did we end up with such splendid

oceans rivers ice caps and clouds like
oceans rivers ice caps and clouds like

the ones that are making the rain today
the ones that are making the rain today

natural processes like burning and
natural processes like burning and

breathing do create water through
breathing do create water through

chemical reactions but other natural
chemical reactions but other natural

processes like photosynthesis use of
processes like photosynthesis use of

that water plus these amounts are so
that water plus these amounts are so

tiny that we can be confident that
tiny that we can be confident that

earth's water wasn't made here over the
earth's water wasn't made here over the

eons
eons

so water must have arrived here on
so water must have arrived here on

meteoroids comets or other objects that
meteoroids comets or other objects that

originated far enough from the sun for
originated far enough from the sun for

frozen water to survive
frozen water to survive

since comets are pretty much just dirty
since comets are pretty much just dirty

ice balls they're a logical candidate
ice balls they're a logical candidate

for the source of earth's water but
for the source of earth's water but

they're far richer in a special kind of
they're far richer in a special kind of

hydrogen called heavy hydrogen hydrogen
hydrogen called heavy hydrogen hydrogen

with a neutron as well as a proton in
with a neutron as well as a proton in

its nucleus than earth water so comets
its nucleus than earth water so comets

probably weren't the source
probably weren't the source

the more likely source is a kind of
the more likely source is a kind of

stony meteorite known as a carbonaceous
stony meteorite known as a carbonaceous

chondrite
chondrite

these meteoroids form far enough from
these meteoroids form far enough from

the sun that they can hold water and the
the sun that they can hold water and the

water they do have has similar levels of
water they do have has similar levels of

heavy hydrogen as earth's water like the
heavy hydrogen as earth's water like the

water raining outside
water raining outside

so it seems as though the water that
so it seems as though the water that

turned our planet into a blue marble
turned our planet into a blue marble

came quite literally out of the blue
came quite literally out of the blue

and if you want a copy of this book to
and if you want a copy of this book to

come into your hands out of the blue it
come into your hands out of the blue it

comes out on october 12th and is
comes out on october 12th and is

available for pre-order now wherever
available for pre-order now wherever

books are sold another thing about this
books are sold another thing about this

is that i was obviously involved in the
is that i was obviously involved in the

creation of this book and made lots of
creation of this book and made lots of

the videos uh on which this book is
the videos uh on which this book is

based and it's still a delight to have
based and it's still a delight to have

these things actually in your hands i
these things actually in your hands i

think minute earth videos are maybe some
think minute earth videos are maybe some

of the best videos to be converted into
of the best videos to be converted into

a book because the illustrations that
a book because the illustrations that

the minute earth illustrators do are
the minute earth illustrators do are

just amazing and in particular in book
just amazing and in particular in book

form where we actually kind of tone down
form where we actually kind of tone down

the narration and the text so to speak
the narration and the text so to speak

and you just have more pictures it's
and you just have more pictures it's

just great it's just really fun to flip
just great it's just really fun to flip

through even though i know all these
through even though i know all these

pictures and i know these these science
pictures and i know these these science

stories i am just super enjoying this
stories i am just super enjoying this

book so i highly highly recommend it
book so i highly highly recommend it

it's a great gift for anybody or just
it's a great gift for anybody or just

for yourself to enjoy the world around
for yourself to enjoy the world around

you
you

again
again

october 12th comes out
october 12th comes out

order it now wherever books are sold get
order it now wherever books are sold get

yourself
yourself

lots of copies
lots of copies

and thank you for joining us for story
and thank you for joining us for story

time with minutephysics
time with minutephysics

and it has a glossary in the back for
and it has a glossary in the back for

those science words you might not be as
those science words you might not be as

familiar with
familiar with