How to pronounce "terrestrial"

why don't we see life out there in the

why don't we see life out there in the

why don't we see life out there in the cosmos you don't need any special

cosmos you don't need any special

cosmos you don't need any special knowledge to consider this question and

knowledge to consider this question and

knowledge to consider this question and I've explored it with lots of people and

I've explored it with lots of people and

I've explored it with lots of people and I found they often frame their thinking

I found they often frame their thinking

I found they often frame their thinking in terms of the barriers that would need

in terms of the barriers that would need

in terms of the barriers that would need to be cleared if a planet is to host a

to be cleared if a planet is to host a

to be cleared if a planet is to host a communicative civilization habitability

communicative civilization habitability

communicative civilization habitability that's the first barrier we need a

that's the first barrier we need a

that's the first barrier we need a terrestrial planet in that just right

terrestrial planet in that just right

terrestrial planet in that just right goldilock Zone where water flows as a

goldilock Zone where water flows as a

goldilock Zone where water flows as a liquid abiog gelesis the creation of

liquid abiog gelesis the creation of

liquid abiog gelesis the creation of life from non-life that's a second

life from non-life that's a second

life from non-life that's a second barrier the ingredients are there we

barrier the ingredients are there we

barrier the ingredients are there we just don't know how they combine to

just don't know how they combine to

just don't know how they combine to create life and presumably there'll be

create life and presumably there'll be

create life and presumably there'll be worlds on which life doesn't start the

worlds on which life doesn't start the

worlds on which life doesn't start the development of technological

development of technological

development of technological civilization is a third barrier there'll

civilization is a third barrier there'll

civilization is a third barrier there'll be worlds where life doesn't give rise

be worlds where life doesn't give rise

be worlds where life doesn't give rise to Advanced Technology communication

to Advanced Technology communication

to Advanced Technology communication across space that's a fourth barrier

across space that's a fourth barrier

across space that's a fourth barrier there'll be worlds where for whatever

there'll be worlds where for whatever

there'll be worlds where for whatever reason civilizations either stay silent

reason civilizations either stay silent

reason civilizations either stay silent or don't spend long trying to

or don't spend long trying to

or don't spend long trying to communicate but for me the Silence of

communicate but for me the Silence of

communicate but for me the Silence of the universe is shouting we're the

the universe is shouting we're the

the universe is shouting we're the creatures who got lucky and all those

creatures who got lucky and all those

creatures who got lucky and all those amazing things dreamed aliens might have

amazing things dreamed aliens might have

amazing things dreamed aliens might have done in the past that could be our

done in the past that could be our

done in the past that could be our future