Kāds labdaris radījis BEZMAKSAS matemātikas lapu, kurā skolēns patstāvīgi var sagatavoties pārbaudījumiem līdz pat 12.klasei: https://t.co/dLGEajtMTi
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Ja neskaita tehnisko valodu, apmācības rīks strādā nevainojami. Vecāki, pārsūtiet saviem bērniem!
The ideal subject of totalitarian rule is not the convinced Nazi or the convinced Communist, but people for whom the distinction between fact and fiction no longer exists.
- Hannah Arendt
Pūču mazuļi nav pamesti vai izmesti no ligzdas. Viņi ligzdu atstāj pirms lidspējas iegūšanas, lai uzlabotu izdzīvotību kopumā. Pieaugušie ir tuvumā un viņus pieskata, nereti ļoti tieši un fiziski.
"The shooting lists were supposed to include teachers of the Ukrainian language, literature, history, ATO veterans, journalists, scientists, writers, priests of the Ukrainian Orthodox Church and other confessions who supported Ukraine, as well as public and political figures, heads of state and local government bodies," said Kyrylo Budanov, the head of Ukraine's Military Intelligence Directorate.
According to Budanov, before the full-scale invasion of Ukraine, Russian occupiers were also briefed on where to place mass graves.
‼️This is the reality that awaits Ukrainians if the war is lost, if our country is occupied. Such repressions are already happening on Ukrainian lands held by Russia. That is why we are fighting. Any peace agreement that has Ukraine cede its territories to Russia, or that would not provide sufficient security guarantees and deterrents in case of another invasion would open Ukraine up to Russian terror like this.
In 1995, a group of scientists conducted a study on the effects of various drugs on spiders, specifically focusing on the way they weave their webs. This research aimed to explore the impact of psychoactive substances on the behavior and motor skills of these arachnids
The initial motivation for the study was a request from a zoologist colleague to shift the time when garden spiders build their webs from between 2:00 a.m. and 5:00 a.m., which was apparently a source of annoyance. The scientists tested spiders with a range of psychoactive drugs, including amphetamine, mescaline, strychnine, LSD, and caffeine, and found that the drugs affect the size and shape of the web rather than the time it is built.
At small doses of caffeine (10 µg/spider), the webs were smaller; the radii were uneven, but the regularity of the circles was unaffected. At higher doses (100 µg/spider), the webs were even smaller, and the design became irregular and fragmented. The scientists also discovered that caffeine has a significant effect on spiders, which is reflected in the construction of their webs.
The study revealed that nearly every drug yielded the same effects, in slightly varying degrees of non-functionality. Spiders dosed with sleeping drugs became "very drowsy," skipped spinning the longest, most challenging radial threads (those on the outer corners of the frame), and left huge gaps in their webs; Benzedrine caused the spiders to spin a spiral "that zig-zagged like an unsteady walker" and induced the inability to locate precise spots within the web; marijuana made the insects omit altogether the inner part of the web; scopolamine, which has hallucinogenic effects in humans, destroyed the spiders' sense of direction altogether.
Overall, this research provided valuable insights into the impact of drugs on spiders and their web-building behavior. While the exact analogy between the effects of drugs on spiders and humans is still uncertain, the study showcased the importance of understanding the effects of psychoactive substances on various organisms.
Šodien, 20. maijā, visā Eiropā sākas Pavasara testēšanas nedēļa @EuroTestWeek . Šīs nedēļas laikā ikviens iedzīvotājs aicināts bez maksas, anonīmi un konfidenciāli veikt HIV, B un C hepatīta eksprestestus HIV profilakses punktos Latvijā.
👉Plašāk šeit: https://t.co/fdKa2obEwp
Ducks are extremely good weeders and a natural way of protecting rice plants: they also leave behind nitrogen-rich fertilizer in their droppings which is beneficial to teh crops.
https://t.co/ORrxDHn0Ss
@lindloul Pateicos par veltīto laiku. Es nepārrakstījos.
Es vaicāju par vārdu "ugra". Varbūt šāds vārds ir sakne kādam citam vārdam, kura nozīme jums zināma?
First, German police arrest Iris Hefetz, our Israeli-Jewish comrade, for opposing genocide in Berlin. Now, Ilan Pappe (@pappe54), the renowned Israeli-Jewish historian, is detained in Detroit by the FBI for questioning over his campaigning against Israel's genocide. Dark times!
Breakdown of the multiple power failures on the container ship 'Dali' that likely caused the impact with the Francis Scott Key Bridge in Baltimore today.
[🎞️ Moshe Schwartz]