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

There's why you have a crappy attitude. You've never been chosen by the Cat. Consequently, your deprivation has disennobled your spirit.

Yes. Just ask the cat.

You probably don't have a dog either.

They have staff to do all that tedious s*it.

You're captive to the myth of human exceptionalism. It's probably too late for you.

I think you should stick to serving your petunias.

Corn was invented by the first americans. Corn is corn, wheat is grain. We don't need europeans to tell us what it means.

Those who not want to see are effectively blind

Same for those who do not want to learn, those are effectivly lost.

So where do they say whales can determine their location by sonar?

"Those who see what isn't written are effectively blind."

Absolutely right. There are several cats that lounge about all day around the entrance to the building where I live. They don't even bother to get up to chase any birds (mostly pigeons) that wander close to them.

Whales, dolphins etc. can determine their location relative to familiar objects by sonar. If the familiar object is a coastline or a sea bed feature that guides them from feeding grounds to breeding grounds, that is what they need to know.

As far as we are aware, they don't know their position as latitiude and longitude - or even know which way is North - but they still navigate by sonar.

I fed a kitten - initially with an eye-dropper - when I was a kid. It was quite attached to me - while it lasted. Cats frequently died young of respiratory diseases where I grew up. The kitten I imported seems to have had a more robust genome.

They don't dignify the question with a response.

We definitely had several when I was a kid, and I did most of the dog-walking.

If cats and dogs have been marking pot sherds since pottery became popular, nobody seems to have found any of them. There's nothing mythical about the writing systems that are recorded there.

They do seem to go after smaller birds than pigeons. Our cats did bring in the occasional dead bird, but nothing as big as a pigeon.

Predatory animals need to kill their prey quickly - defensive wounds can take quite a while to heal, and a predator can starve if they don't heal fast enough.

That is bullshit

I can see things on teefee all the time that are not written. Inventions come from being able to see what is not written yet. Try the brain. It is located between the ears If you can see your mama at home you know where you are. If you hear your mama cry you know you are close .

Like an other poster pointed out, navigation by following for example coast lines using sonar is possible. Submarines navigate in narrow spaces / following trails using sonar too. And that also goes for other underwater landscapes that can be used for navigation. Other things count too, streams, temperature, present of edible prey, etc etc. I leave it at that, you are either obstinate or unable to process and expand this sort of stuff...

It is impossible to determine location with just radar, sonar or a compass.

Radar and sonar just tell you there is something, or nothing, in front of you.

A compass just provides a bearing relative to the Earth's magnetic field.

To determine a location you also geographic data, i.e. a map of some sort.

I did sme tests on an Efinix T20. I ran a bunch of signals around, in and out, and measured prop delay, power supply effects, tempco, and jitter. I ran a bunch of logic on and off, including a 200 MHz DDS and a bunch of long pseudo-random shift registers.

I saw zero crosstalk and zero ground noise. The core used 24 mA at 1.2 volts. All those ground balls are great.

Building the 200 MHz DDS and the PRBS things in ECL would be insane.

PhD? Pairs?

My college senior project was "The tunnel diode slideback sampling oscilloscope" which, unfotrunately, won some awards.

Your insult-per-post ratio keeps increasing and averages well over unity now.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

They used a couple of small eproms.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

Non sequitur.

Sure you can "navigate" by by observing a coast line, but only in the sense of not running into the coast line.

How do you know which coast line it is and where you are on that coast line absent geographic data of some sort, i.e. a map?

If you set sail in Hawaii headed for the port of Long Beach with only sonar or radar you have no clue which way to steer and could arrive at a coast line anywhere from Canada to Nicaraua.

If you set sail with a compass and maintain a heading of about 52 degrees, you will likely arrive at a coast line somewhere between northern Baja California Mexico and Oregon.

I talked to a kid at SFSU who designed an opamp and is going to himself pay to have some fabbed in a shared-wafer CMOS process. More like $4K for delivered parts than 100K for just a mask.

We brainstormed the things he would have to do to make it c-load stable.

There are FPGA based delay and time stamp tricks that need frequent cal. But they are unavailable for use dueing cal, so will miss triggers.

As precisely as we want to pay for. 10ps RMS is affordable.

Any interesting experiment involves risk.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

Succinct and well said.

Nope. Absolutely true. You can't determine location from compass alone or sonar alone. Which was your original claim, and that a reptile brain compass is just like GPS. It's not, as has been pointed out to you by a few people now.

So TV is your source for technical data. We should have known!

Strawmen also come from beint able to see what was not written! And, you just invented a strawman! How bout that?

(snip wailing & gnashing of teeth)

Bill, you have a strong constitution to be able to fight off the slowly dawning recognition of sarcasm.

You really have no clue and never even used those things or designed those things

Even in the simplest case, say in a sea or lake looking left distance 1 looking right distance 2 looking forward distance 3 Looking backward distance 4 Looking down for how far from sea floor, looking up for depth

-------- | | | U | | | | | --------

Now by 'looking around' you know exactly where you are relative to the coastlines.

Normally I would reply with: For 10 US dollies I will say you are right, for 15 I will say it twice, give you a discount.

But REALLY get a clue

Some drones navigate with optical or radar topological mapping. Whales could do that too, with sonar.

They could combine that with other clues, like temperature and salinity and taste and mag fields. Salmon are pretty good at finding the pool where they were born.

Be nice.