James Tour

speaker

1,512 appearances 1 recordings 1 series first heard Dec 2025 last heard 15 Dec

James Tour’s voice in public audio — every appearance, attributed to the second.

Trend

recordings per month · last 12 months

Recordings per month over the last 12 months — 1 in all, peaking in Dec 2025 with 1.

newest first · ▶ plays the moment

These genetic networks are not going to allow body plan changes to happen.

And so there's a big problem.

But how do they explain the Cambrian explosion?

There is no explanation for that.

There's no explanation.

Yeah.

So we should see this seamless transition.

If it were a gradual process.

And in the Cambridge explosion, we don't see that.

There's this abrupt change, an abrupt change, where many new species burst forth.

So we don't see body plant changes.

So you are absolutely right.

I mean, I've seen some of the things that you've said.

We've certainly seen microevolution.

Now, that's why this term evolution is sort of a squealy sort of thing.

You've got to...

It depends on how you define this thing.

We certainly see microevolution, these small changes within a kind, within a species.

You see these small changes.

I have to be careful of that because sometimes in plants, you can have a doubling of the genome.

Showing 641–660 of 1,512 · page 33 of 76