She scolded him for not mowing the lawn.

I am allergic to pollen.

But pollen forensics can be very subtle.

Tom is allergic to pollen.

He's allergic to pollen.

Cool pollen, though.

Perhaps there's more pollen in the city.

Now, much of the pollen will still be there after repeated washings.

So, what are pollen's properties? I hear you ask.

That's a geranium pollen.

In contrast to the industrial wasteland of Apokolips, New Genesis is a veritable paradise covered in lush forests and grasslands.

Pollen can cause severe allergic reactions.

But anyway, take a look at its pollen.

Many insects have been used by plants as vectors for the transport of the pollination, but not just insects even birds, reptiles, and mammals like bats rats are normally used for the transportation of the pollen.

Probably you are allergic to pollen or dust.

A lot of people are dealing with hay fever now.

Its diet consists primarily of fruit, nectar, and pollen.

With the trains coming in to urban hubs, they can carry pollen with them, very light pollen, and it's just a big supermarket in the city.

Pollen is produced by the anthers of flowers.

But not all pollen is quite so simple looking.

Like I said, pollen carries the male sex cells.

The pollen has little barbs on it, if we look.

That tells me that it's actually been fossilized, this pollen.

The fossilized pollen was not of savanna vegetation.

Now the way that plants transmit that information is through pollen.

Jonathan Drori Every pollen grain has a story

Pollen is tiny. It gets on to things, and it sticks to them.

And there is as many different kinds of pollen as there are flowering plants.

My story is actually not about plant propagation, but about pollen itself.

I hope I've opened your eyes, if you'll excuse the visual pun, to some of pollen's secrets.

First of all, pollen is tiny. Yes we know that.

Again this time, sycamore wind dispersed.

Four very different habitats might look similar, but they've got very different pollen signatures.

And then they were so clever, they found a way to analyze fossilized pollen.

And the reason for that is they've got to chuck out masses and masses of pollen to have any chance of the pollen reaching another plant of the same species.

Most pollen that causes hay fever for us is from plants that use the wind to disseminate the pollen, and that's a very inefficient process, which is why it gets up our noses so much.

Pollen is a flower's way of making more flowers.

So, that's 20 micrometers across, that pollen grain there.

And the plant showers them with pollen, and off they go and pollinate.

At night they get covered in pollen, which showers down over them, and then the bristles that we saw above, they sort of wilt and allow all these midges out, covered in pollen fabulous thing.

Here are some examples they're very smooth if you look at them of tree pollen that is meant to be carried by the wind.

Books are the bees that carry pollen from one mind to another.

Each anther can carry up to 100,000 grains of pollen, so, it's quite prolific stuff.

Here is a scanning electron micrograph of a grain of pollen.

A different pollen signature, if you like, or a different pollen fingerprint.