Marnie Chesterton

Thank you for your question, Adam. So, is there a frame rate, I guess, to how we see? And why does that vary if it varies? Okay, to answer, we reached out to Dr. Clinton Harlem, who researches the speed of visual perception in humans and animals at Trinity College Dublin. And he began by telling us what exactly the speed of sight is.

So, animals have a frame rate for processing visual information, which is affected by the way each experiences the world. Clinton told us that peregrine falcons can see two to three times faster than humans because they need to effortlessly track and catch fast-moving prey.

Their visual processing goes up to 129 frames per second, while ours sits at around 40 to 60 frames per second. So there is a range to human speed of sight as well, but what causes it? So it does vary, and there are a lot of things that can affect how fast we see. So when you think about all the external factors, they all have to do with

Thank you to Clinton Harlem there and thank you to Adam for your question. Listeners, if you have any questions and you'd like the Unexpected Elements team to have a stab at answering it, the email address is unexpected at bbc.co.uk or you can send us a message or a voice note to WhatsApp. It is plus 44 330 678 3080.

David Attenborough turning 100 has not gone unnoticed by our colleagues over in news, which is good because that means that we can pick the news peg of David Attenborough's 100th birthday for this entire show. But it does mean that there's quite a lot of Attenborough-related content on the airwaves at the moment.

When I was listening to the radio earlier this week, I caught a discussion of his influence on a group of wildlife documentary makers who'd worked with him. This was on a BBC World Service programme called Outside Source. Here's wildlife documentary maker Victoria Bromley. David has been a witness in his lifetime to the very quick change to where we've arrived at today. As I say, he has a very deep understanding of that.

Mutta hän kuitenkin on kuitenkin kokemusta ja ymmärrystä. Hän ei todennäköisesti ole seuraava uusista kehityksistä. Hän on erittäin yllättynyt teknologiasta ja uusista kokemuksista. Se on myös se, mikä on suosittanut hänen karjansa. Hän on nähnyt, mitä on mahdollista.

Wow, the changes that he must have seen over his century. That was the big thing that struck me. What must he have seen? Not just seen, but shared with us, highlighting the life cycles and the threats facing other species that share the planet with us.

In wildlife conservation, animals get the lion's share of the attention, pardon the pun. But according to research that's out this week by the Royal Botanic Gardens Q and the Zoological Society of London, the world's flowering plants are in serious trouble.

So that is one of the co-authors, Dr. Felix Forrest, who I didn't even notice is a case of nominative determinism until my producer Alice pointed it out. Well done, Alice. So Felix has calculated the genetically distinct plants, the ones called Edge. And as he said, a fifth of them around the world are under threat. So why is that a problem?

So, there's a lot to lose, but identifying the edge plants gives conservation scientists a list of priorities, what to focus on first. So what exactly is being saved, though, and where? Oh, everywhere. I mean, this is global efforts. So Mozambique, Mexico, Nepal, where you just were, Chavi, Mali, Philippines, India. I did ask Felix for his favorite tree, and...

It's something that they only just discovered over a decade ago, and it only grows on the top of mountains in the cloud forests of Honduras, and genetically it's incredibly distinct. That's very cool.

Tiedän. Lisäksi edjepalveluissa on jotain nimeltä Tytum arum, joka on iso, 2 metrin iso palvelu, joka puuttuu yhdellä viiden vuoden ajan, ja kun se puuttuu, se pöytää kuin korva. Toinen edjepalvelu on palvelu nimeltä Wallamie pine.

It's not only a conservation good news story, which is a rare treat, but it also brings us back to David Attenborough.

Tässä se on. BBC-manageri, maailmanlaajuisen esimiehen, 100-vuotias ja metsänpantaja. Toinen kappale David Attenbergin kappaleeseen. Voinko lopettaa vielä toisen videon maailmanlaajuisen esimiehen Victoria Bromleyn kanssa, joka puhuu siitä, miksi Attenbergin on niin inspiraattorinen? Se, mikä on niin yllättävää, on se, että hän ajattelee kaikkia hänen perheensä. Kaikki hänen ymmärryksensä, ei vain luonnonhistoriaa, vaan myös, miten maailma on muuttunut hänen elämänsä.

Luulen, että paljon ihmisiä, jotka ovat nähneet isoja muutoksia, erityisesti 1950-luvun aikana, ja ihmisten vaikutukset maailmassa, ovat yllättyneitä. Mutta Davidin tärkeintä on se, että hän on varmasti nähnyt enemmän maailmaa kuin jokainen. Hänellä on hyvin ymmärrettävä ymmärrys maailman tilanteesta, ja hän on edelleen toivottavaa.

Juontaja Erja Hyytiäinen

We've learnt about the immortal jellyfish that can turn back into a juvenile. We've learnt about tiny Antarctic plankton that may lock up more carbon than the Amazon. We've heard about Nepal's landslide safe zones that might not actually be that safe. And we've heard why a peregrine's eyesight is just faster and better than ours. Tristan, Chavi, out of all of that lot, any favourite facts from today?

Like Beatles wigs in the sea floating around.

Well, it's time to bring this party to a close, but before I go I should thank my guests for turning up and being wonderful this week. I should also thank David Attenborough, even though he didn't come to this particular party, but this is part of, I'd say, a week-long celebration over different bits of the BBC as Sir David Attenborough turns 100.