Neil deGrasse Tyson Talks Life on Mars | StarTalk

Larry Wilmore had a question for me he

Larry Wilmore had a question for me he was he was like totally there – let’s

was he was like totally there – let’s

was he was like totally there – let’s find out so let me ask you this um Mars

find out so let me ask you this um Mars

find out so let me ask you this um Mars Mars is there a possibility that there

Mars is there a possibility that there

Mars is there a possibility that there could have been I don’t mean microbial

could have been I don’t mean microbial

could have been I don’t mean microbial life but I mean actual intelligent like

life but I mean actual intelligent like

life but I mean actual intelligent like human life on Mars at one time I not

human life on Mars at one time I not

human life on Mars at one time I not gone now I say yes gone now now extinct

gone now I say yes gone now now extinct

gone now I say yes gone now now extinct now extinct I mean could Mars have been

now extinct I mean could Mars have been

now extinct I mean could Mars have been inhabitable for a variety of reasons

inhabitable for a variety of reasons

inhabitable for a variety of reasons maybe the atmosphere is different it’s

maybe the atmosphere is different it’s

maybe the atmosphere is different it’s all broken down now all that kind of

all broken down now all that kind of

all broken down now all that kind of stuff so I think about that often and

stuff so I think about that often and

stuff so I think about that often and pit some people think life on Earth may

pit some people think life on Earth may

pit some people think life on Earth may have started on Mars and yeah then they

have started on Mars and yeah then they

have started on Mars and yeah then they to get pen spermy yes called

to get pen spermy yes called

to get pen spermy yes called meteorites coming over yeah yeah yeah

meteorites coming over yeah yeah yeah

meteorites coming over yeah yeah yeah throw away micros in a thing coming

throw away micros in a thing coming

throw away micros in a thing coming across the planet starts here spawns

across the planet starts here spawns

across the planet starts here spawns there so here’s the interesting thing

there so here’s the interesting thing

there so here’s the interesting thing about civilization on earth mm-hmm if

about civilization on earth mm-hmm if

about civilization on earth mm-hmm if all humans left Earth today you can ask

all humans left Earth today you can ask

all humans left Earth today you can ask how long would you have to wait before

how long would you have to wait before

how long would you have to wait before there wasn’t a trace of our existence

there wasn’t a trace of our existence

there wasn’t a trace of our existence here mm-hmm

here mm-hmm

here mm-hmm you have to wait until the continents

you have to wait until the continents

you have to wait until the continents subducted bringing entire cities with

subducted bringing entire cities with

subducted bringing entire cities with them into the lower levels of our the

them into the lower levels of our the

them into the lower levels of our the Earth’s crust okay and in in those zones

Earth’s crust okay and in in those zones

Earth’s crust okay and in in those zones is so hot everything melts back and it

is so hot everything melts back and it

is so hot everything melts back and it gets spewed out of a volcano again

gets spewed out of a volcano again

gets spewed out of a volcano again what’s the timeframe for that millions

what’s the timeframe for that millions

what’s the timeframe for that millions of years millions of uses not that long

of years millions of uses not that long

of years millions of uses not that long okay so no watch right Mars is not as

okay so no watch right Mars is not as

okay so no watch right Mars is not as geologically active as Earth now now but

geologically active as Earth now now but

geologically active as Earth now now but you have to go way way far back millions

you have to go way way far back millions

you have to go way way far back millions of years know billions oh so now you’re

of years know billions oh so now you’re

of years know billions oh so now you’re getting into billions so I think it’s

getting into billions so I think it’s

getting into billions so I think it’s unlikely on Mars we would we would see

unlikely on Mars we would we would see

unlikely on Mars we would we would see settlements along the riverbanks that

settlements along the riverbanks that

settlements along the riverbanks that are now completely dry Dubes well why

are now completely dry Dubes well why

are now completely dry Dubes well why would you lose a city but still have the

would you lose a city but still have the

would you lose a city but still have the dried riverbed that’s there that does

dried riverbed that’s there that does

dried riverbed that’s there that does that that doesn’t play right if you’re

that that doesn’t play right if you’re

that that doesn’t play right if you’re gonna decide we were relating it to

gonna decide we were relating it to

gonna decide we were relating it to what’s here though yes what house can

what’s here though yes what house can

what’s here though yes what house can you do it oh it was an alien city that

you do it oh it was an alien city that

you do it oh it was an alien city that evaporates when they’re done with it I

evaporates when they’re done with it I

evaporates when they’re done with it I mean I don’t

evaporating cities like self-destruct

evaporating cities like self-destruct that’s cool

that’s cool

that’s cool it’s cool but not likely not cool but

it’s cool but not likely not cool but

it’s cool but not likely not cool but not likely Chris Eisley