"Han lägger en tung sten på bordet."

Translation: He puts a heavy stone on the table.

[Arnauti]

If anyone wonders, legatrix' comment probably refers to tungsten, a chemical element the existence of which was predicted by two Swedish chemists. The discovery itself was later made by two Spanish brothers.
Chemistry is an area where Swedish scientists have historically been very successful, as you can see from this table:

[Heidijan]

Is Marie Curie counted as French here?

[JustusRobi3]

Yes, the name "tungsten" comes from Swedish tung 'heavy' + sten 'stone'. So literally 'heavy stone'.

[AlexisLinguist]

And Americans found all the radioactive stuff, it seems, unless I am remembering the periodic table incorrectly (please). . .

[Arnauti]

At least the French started that.

[Arnauti]

And a Swede is credited with Thorium, which is also radioactive.

[creativemetaphor]

You'd think a radioactive element would have been named after Loki ;)

[Byx-]

beyond being radioactive, it is a feasible fuel for nuclear power operations

[bikush]

For anyone interested, thorium does not produce weaponizable byproduct so its research was marginalized back in the days. Only now we are getting usable thorium salt reactors, but the damage to the public oppinion of fission reactors has already been done.

[Byx-]

tho I feel like francium may not have been an American discovery

[legatrix]

Hmm, can see a little hint in there. Just reminding us of Sweden's contributions to world knowledge, no doubt!

[Troettkatt]

So, I am the only one who thought about Obelix? :-o

[karin484473]

How can we tell if it is put or puts in this sentence?

[BunnyBeam]

I'm fairly sure puts is present tense (lägger) and put is past tense (lade)

[Jonna789167]

Is anyone else than me having trouble getting this trough in the speech practices? It takes me so many times to get it right per lesson and usually it takes max two times to pass other the ones..