Znanost in tehnologija

Prva študija

Od ebole in covida-19 do novih pandemij: skoraj polovica teh živali prenaša bolezni na ljudi

Vesolje

Trk črnih lukenj – dogodek, ki se zgodi enkrat v človeški zgodovini

6261520 Astronaut Eugene A. Cernan, Apollo 17 commander, is photographed next to the deployed United States flag during lunar surface extravehicular activity (EVA) at the Taurus-Littrow landing site. The highest part of the flag appears to point toward our planet Earth in the distant background, 1972 (photo). No Use Germany. No Use Italy.

Vesolje

Stanley Kubrick, kje je kamera? Resnica o najbolj trdoživi teoriji zarote

**VIDEO AVAILABLE: CONTACT INFO@COVERMG.COM TO RECEIVE**BY MARK WORGANOctopuses have a special 'sex arm' they use to identify partners by taste and mate with them, according to researchers at Harvard University.The findings, published in the journal Science, show that males can locate and fertilise females without seeing them, sometimes mating at arm's length.Scientists say the research sheds new light on how these largely solitary animals reproduce, and may help explain how new species evolve.Male octopuses have eight arms, but one - known as the hectocotylus - is specially adapted for reproduction."Male octopuses use a specialized arm called the hectocotylus to identify females and navigate their internal organs to reach the oviduct and deliver sperm," the researchers, led by lead author Pablo Villar, write in their paper.During mating, the arm searches for the female's mantle cavity and deposits packets of sperm, known as spermatophores. The researchers found that the arm is lined with receptors similar to those used by other arms to explore the seabed.Octopus limbs are highly sensitive, with each suction cup containing thousands of sensory cells. Much of the animal's nervous system is distributed throughout its arms, allowing them to act independently of the brain.To test how the animals use these abilities, scientists observed mating behaviour in the California two-spot octopus (Octopus bimaculoides).Males and females were placed on opposite sides of a tank, separated by a barrier with small openings. Despite being unable to see each other, males were able to extend their specialised arm through the divider, locate the female and begin mating.The study found that such interactions could take place even in complete darkness. When two males were paired, however, no mating attempts were observed, suggesting females emit a specific chemical signal.Further experiments pointed to the hormone progesterone as a key factor.Research

odkritje

Ljubezen na dosegu roke: lovka hobotnice je jezik in spolni organ hkrati

NASA Astronaut Reid Wiseman, Artemis II mission commander, exits the Orion crew module to join the three other crew in a raft, before transiting to the U.S. Navy ship USS John P. Murtha in the Pacific Ocean off the coast of California, U.S. April 10, 2026. NASA's Artemis II mission sent four astronauts on a flight around the moon in the Orion space capsule, which splashed down after the ten day journey. U.S. Navy/Mass Communication Specialist David Rowe/Handout via REUTERS THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. THIS IMAGE WAS PROCESSED BY REUTERS TO ENHANCE QUALITY, AN UNPROCESSED VERSION HAS BEEN PROVIDED SEPARATELY.

VRNITEV NA ZEMLJO

Bolj vroče od lave: kako vesoljsko plovilo Orion prenese temperature 2700 °C

A view of Earth taken by NASA astronaut and Artemis II Commander Reid Wiseman from one of the Orion spacecraft's window after completing the translunar injection burn on April 2, 2026. The image features two auroras (top right and bottom left) and zodiacal light (bottom right) is visible as the Earth eclipses the Sun. NASA/Handout via REUTERS THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY TPX IMAGES OF THE DAY

ZATON ČLOVEŠTVA

Usodni dan: Nasin superračunalnik napovedal konec življenja na Zemlji

Preizkusili smo

Sony linkbuds clip: Niso modni dodatek, hkrati so komaj slušalke

Nova storitev

Huaweijeve pametne ure zdaj omogočajo brezstično plačevanje

A devestating shot of plastic waste in the ocean. Water Pollution.

MIKROPLASTIKA

Plastika v morju živi: znanstveniki odkrili novo ekosistemsko plastisfero

Najnovejše

Flusspferde Mutter Nala mit Kind Willi, vorne Vater Bouli, Zoologischer Garten, Berlin, Deutschland *** Hippopotamus mother Nala with child Willi, father Bouli in front, Berlin Zoological Garden, Germany No Use Switzerland. No Use Germany. No Use Austria

invazivna vrsta

Kolumbijci imajo dovolj Escobarjevih povodnih konjev, začeli jih bodo odstreljevati

Financiranje strank

Plačujemo jih, čeprav niso v parlamentu: kam gre denar strank, ki so ostale pred vrati?

Sončni vitamin

Vitamin D ključen za zdravje, a v previsokih odmerkih je lahko tudi nevaren

ZAKULISJE

»Očitno je neuravnovešen«: nekdanji šef Cie poziva k odstavitvi Donalda Trumpa

Potovanje v zgodovino, 7. del

Sedem obrazov Irana: družba paradoksov in neuklonljivega duha