Homing pigeons orient themselves by the Sun’s position under sunny skies and rely on their magnetic sense when it is cloudy.
Under overcast conditions, homing pigeons with their normal liver macrophages had little issue flying a 19-kilometer route for which they had been trained.
When injected with clodronate liposomes that knocked out the liver macrophages, the pigeons could navigate the route without issue when it was sunny.
Under overcast skies, however, homing pigeons with depleted liver macrophages struggled mightily to find their way home—suggesting the immune cells play a role in the birds’ magnetic sense.
Learn more: https://t.co/7TmzQAvvnu
"For reasons which I failed to penetrate, the secret of Vril could be found by contemplating the structure of an apple, sliced in halves. No, I am not joking, that is what I was told with great solemnity and secrecy."
Willy Ley (Astounding Science Fiction, 1947)
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"The bee kisses the blossom and steals its soul, yet leaves it more alive than before VI."
Elseedart
Acrylics painting on canvas
Size: 44x59cm
Bees are tiny poets of persistence, teaching us about community, fragility, and the quiet miracles that hold the world together.
Adorable Roman mosaic of a tigress and three playful cubs! 🐯❤️
Eastern Roman Empire, AD300s.
📷 Cleveland Museum of Art https://t.co/1iw85ZtdPx
#MosaicMonday#Archaeology
Rare Sky Alignment: Venus, Jupiter, the Moon, and Mercury will gather in the same region of the sky on June 17–18, creating a beautiful celestial display visible to the naked eye.
Garden quartz is a type of clear quartz crystal that has natural inclusions, things like chlorite, iron, or other minerals. These inclusions often look like tiny landscapes, moss, plants, or underwater scenes
Beautiful blue glass beads from the Danish Bronze Age.
Found by a farmer at Humlum in Denmark in 1885. Glass analysis published in 2015 shows the beads originated in Mesopotamia indicating far-reaching trade networks some 3,000 years ago.
📷 National Museum of Denmark
#Archaeology