What does "recorded human history" mean?

[lauradi7dw]

The explanation of today's Astronomy Picture of the Day claims that 10,000 years ago is before recorded human history.
Does that mean text, using words?  Aboriginal rock paintings in Australia (using ochre or other pigments) have been dated to 25,000 years ago, or considerably earlier, and the cave paintings in France may be 35,000 years old.  At a minimum, I'd think that we can get some of the messages conveyed, like "We saw these animals.  Animals are cool."

I have been thinking of starting to tweet, because I have several thoughts a day that I consider putting here on LJ, but they tend to be fairly short, or just links.   But who would follow me? 

Comments

[nosrednayduj]

I vaguely considered twitter, because it would be the same thing I use LambdaMOO (now Dhalgren) for -- some short blither about what I'm doing today. It would be hard to train myself to put one connected thought together instead of in three or four short sentence fragments. And I'm not really happy about the being able to count how many people follow me. I mean, I suppose I know how many people are in the room on Dhalgren (not many), but that's more passive than actively selecting someone to follow. Also, I want to get all my tweets at a random time of my choosing, not when they are tweeted (like MOO scrollback). Maybe that's an option -- kind of a digest. I should learn. Anyway, your LJ friends might follow you to start with...

[lauradi7.livejournal.com]

You can follow people on Twitter whenever it's convenient for you by knowing the person's account URL
For example, Neil Gaiman is at https://twitter.com/neilhimself It's mostly a links dump, but has interesting stuff.
Neil deGrasse Tyson is https://twitter.com/neiltyson
Some people tweet an inordinate amount, but others are more sporadic - a friend of Arthur's writes for the Globe. During the marathon bombing excitement, he was tweeting almost around the clock, but he's only tweeted twice in May.
The bees on the roof of the new NPR building tweet (in a buzzy way)
https://twitter.com/NPRBees
I sometimes check on the safe biking folks https://twitter.com/BikeSafeBoston
It could use up all of one's time, I expect.