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Top 10 David Grinspoon Quotes

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10

We don't know that Venus had oceans, but there's every reason to believe it did.

9

I'm a strong advocate of new missions to Venus.

8

As a young planet, Venus was losing hydrogen rapidly to space. The oceans boiled off, and after some period of time, perhaps 600 million years, there was no surface water.

7

Earth is going to lose its oceans in the future, just as Venus did in the past. How long planets retain their oceans is a function of distance from the sun, all other things being equal.

6

I'm an astrobiologist, and I come from a planetary science background, so in a very broad sense, I study the evolution of planetary environments.

5

I do comparative studies of climate evolution, and the interactions between planetary atmosphere and surfaces and their radiation environment, and try to understand the environmental factors that can affect a planet's habitability and how they change over time.

4

Radiation is one of the important factors in evolution. It causes mutation, and some level of mutation is actually good for evolution.

3

Mars does not have an atmosphere and does not have a magnetic field today, so the planet doesn't have the protection from radiation that our atmosphere and magnetic fields provide us on Earth.

2

What I wonder most about the Anthropocene is not when did it start - but when, and how, will it end? Will it end? Or is it possible that our own growing awareness of our role on Earth can itself play a pivotal role in shaping the outcome toward one that we would desire?

1

Now, humans have become a dominant force of planetary change and, thus, we may have entered an eon of post-biological evolution in which cognitive systems have gained a powerful influence on the planet.

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Today's Quote

We lived together as kids, and now we're taking care of each other as men.

Quote Of The Day

Today's Shayari

तुम्हें मांगने के बाद_मैंने,
बाकी__सब_तुम्हारे___लिए__माँगा.

Shayari Of The Day

Today's Joke

फेकू ने पप्पू से पूछा: 'मोहब्बत शादी से पहले करनी चाहिए या शादी के बाद?'

पप्पू ने कहा: 'कभी भी...

Joke Of The Day

Today's Status

Life is perishable the quicker you consume it, the better it feels. Stop thinking, start living. Good morning!

Status Of The Day

Today's Prayer

Speak in faith, and everything you declare shall be yours. No weapon formed against you shall prosper, and every tongue...

Prayer Of The Day

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