Never in all their history have men been able truly to conceive of the world as one: a single sphere, a globe, having the qualities of a globe, a round earth in which all the directions eventually meet, in which there is no center because every point, or none, is center — an equal earth which all men occupy as equals. The airman's earth, if free men make it, will be truly round: a globe in practice, not in theory. The regret on our side is, they used to say years ago, we are reading about you in science class. Now they say, we are reading about you in history class.

This is an H2, a subtitle if you prefer

The airman's earth, if free men make it, will be truly round: a globe in practice, not in theory. The regret on our side is, they used to say years ago, we are reading about you in science class. Now they say, we are reading about you in history class.

• We are all connected;
• To each other, biologically.
• To the earth, chemically. To the rest of the universe atomically.
• Science has not yet mastered prophecy.
• We predict too much for the next year and yet far too little for the next 10.

Guess what? This is an H3.

Never in all their history have men been able truly to conceive of the world as one: a single sphere, a globe, having the qualities of a globe, a round earth in which all the directions eventually meet, in which there is no center because every point, or none, is center — an equal earth which all men occupy as equals.

That's one small step for [a] man, one giant leap for mankind.

The airman's earth, if free men make it, will be truly round: a globe in practice, not in theory. The regret on our side is, they used to say years ago, we are reading about you in science class. Now they say, we are reading about you in history class.

1. We are all connected;
2. To each other, biologically.
3. To the earth, chemically. To the rest of the universe atomically.
4. Science has not yet mastered prophecy.
5. We predict too much for the next year and yet far too little for the next 10.

An H4, that's a heading, you know

I believe every human has a finite number of heartbeats. I don't intend to waste any of mine. I don't know what you could say about a day in which you have seen four beautiful sunsets.

That's one small step for [a] man, one giant leap for mankind.

An H5 here, it should be smaller than the H4

I believe every human has a finite number of heartbeats. I don't intend to waste any of mine. I don't know what you could say about a day in which you have seen four beautiful sunsets.

That's one small step for [a] man, one giant leap for mankind.

And of course, an H6

I believe every human has a finite number of heartbeats. I don't intend to waste any of mine. I don't know what you could say about a day in which you have seen four beautiful sunsets.

That's one small step for [a] man, one giant leap for mankind.