97-million-year-old fossils reveal the earliest known animal "GPS"

Birds return to the 'house' they build. Takes a lot of work to build a new one every year !

Those who do - do.

If they took a long time, there would be flocks of birds randomly flying around for days on end in Spring looking for their nesting sites; the absence of these flocks suggests that they find their nests promptly.

Not all birds can fly but that doesn't say anything about those that can.

The ones that do obviously have extraordinary, and unknown, navigational mechanisms.

As in, all over Georgia?

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

OK, it's not complex. Explain how they do it.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

Trees navigate by touch.

Nice, a tree with so many legs!

Ants navigate by smell, if your have an ant problem you can use some tea-tree oil to keep them away, tried it and it works.

Nope, how it's done has been known for a long time.

Nope.

I'm not a tutoring service and there are lots of articles on the Internet on the subject.

So they might find a better place?

I think the reason is that birds mate and lay a bunch of eggs. Returning to the same site becomes a reunion of siblings, and a reunion of mates. If other clutches return to to nearby trees, that forms a genetic tribe.

Most successful critters are tribal. Some tribes live together, but not all. Migratory birds can have a genetic tribe if they meet up in breeding season.

Tribes seem to have about 150 members. It would be interesting to study annual bird reunions from that direction.

One could also graph navigational accuracy vs avearge egg count.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

Excellent article, but it misses my tribal theory.

And a species needs a few maverick explorers to discover new, better sites and seed new tribes. That might happen automatically if a fire or a storm takes out their trees.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

And by fibers.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

Birds often travel in flocks over longer distances. Navigation likely done by the older ones, also from memory, the younger ones learning. When the seasons change you can see large flock of birds here moving.

"While sleeping mid-flight, frigatebirds don’t go completely on autopilot; the birds often sleep with only one side of their brain, leaving the other side awake."

I'm being picky here but the correct collective noun for eggs is a "clutch".

Which can be dealt with by having two delay channels, one of which self-calibrate which the other is generating delays, as I've pointed out here before.

At some point two delay generators get to be cheaper than one super-precise single delay generator, and 10 picoseconds isn't all that precise these days.

It should also involve some original thought. "Not invented here" can be a fatal disease.

A less extreme example of the kind you represent, with the advantage over you that I do know a bit more about what I'm talking about.

My wife was a remarkably intelligent woman, and had to deal with a lot rude dim-wits - not as dim as you, but regular academics can become hide-bound. Some of her more acid observations do get recycled here.

Even John Larkin notices when a poster starts being remarkably unpleasant.

He did his Ph.D. at Melbourne University. There will be copy of his thesis in the university library. Pairs of tunnel diodes gave him a more designable memory element than a single tunnel diode would have, but not

- it seems - designable enough to be commercial.

Your capacity to find insults is remarkable. You don't get anything like as many as you deserve, so presumably you feel the need to uncover the attention you feel you should have got.

You're doing a great job of it yourself. I wonder, did you go to school to learn to be so rude, or is it a natural talent?

I mean, you make so many assumptions about me, than I am starting to wonder if you still have a biomass in your brain, or if it's a chip like Desti Nova?

You probably don't even know which fictional character Desti Nova is, but that's also irrelevant, you can ask the nearest L.L.M.