Showing Off Those Glide And Pivot Skills 😶‍🌫️⁠

To post about the miniature melo (Micromelo undatus) may seem a bit odd, as it is not a nudibranch but a closely-related sea snail! Its thinly-calcified shell is easily seen covering half of its back and is patterned with dazzling brown-red lines, a stark contrast to the blue, white-spotted body below. It lives in many tropic waters, whether that be Japan or Florida, and reaches about 3cm in length. It eats polychaete worms, and uses their toxins as its own.

Trip to the Osa Pennisula

Trip

Rocks

Mangrove

Stolen

On Friday at around 5:50 am., we left for our first IFSA-Butler organized trip. The bus drive was hours long, but we made stops for breakfast and to see indigenous artifacts. We stopped at the Parque de las Esferas. Here, we saw large spherical rocks that were shaped by Costa Rica’s indigenous peoples hundreds and thousands of years ago. They shaped the rocks by placing them in streams or rivers and used smalls rocks of different shapes to hit them. They were used to make maps of the stars, commerce, and many other things. Unsurprisingly, over the years many myths have been created about their origins and purposes. Some people say that they were made by UFOs or gods.

Later after lunch, we got a boat tour of the Térraba-Sierpe Mangrove, the largest mangrove in Costa Rica. We saw many species of birds: Baltimore Orioles, turkey buzzards, woodpeckers, various species of herons, and many more as well as more wildlife like a Jesus lizard (but we did not see it walk on water as it was on a tree branch) and different species of mangroves such as the red and black mangroves. After about an hour and a half boat ride, we got to the resort called the Corcovado Adventure Tent Camp. After we were settled in, we went to the beach for a little bit. After dinner, we were told to go back to our tents and make sure that everything was still there. All of my stuff was still in our tent, but when I returned to the central pavilion, I learned that the guys in the tent next to ours had both of their bags stolen, including a wallet, a laptop, an EpiPen, and most of their clothing. After about 45 minutes, a group of us went on a night walk that lasted about an hour. When we returned, Rodney, our program director, had an announcement to make. He decided that since one of the thing’s stolen was an EpiPen for an allergy to bees and the student did not have another one with him, we would leave on Saturday right away breakfast, instead of continuing with the rest of the trip as planned and returning to Heredia Sunday night. On our way home Saturday, we stopped at a bridge over el río Tárcoles to look at the crocodiles that gather in the river below.

Sharks – like this sandbar shark in Flower Garden Banks National Marine Sanctuary – have several adaptations that make them excellent predators. 

Specialized organs called ampullae of Lorenzini help sharks sense electric fields in the water generated by other fish. Their eyes, too, are specially adapted: all shark eyes have a tapetum lucidum, a layer of mirrored crystals located behind the retina, allowing them to see in in low light conditions and up to ten times better than humans in clear water. 

Despite these adaptations, sandbar sharks and other sharks typically pose little threat to humans. We’re more dangerous to them than they are to us! 

(Photo: Nick Zachar/NOAA) 

[Image description: A black-and-white photo of a sandbar shark.]

When wood turns into glitter

Many moons ago, in the area that is now Nevada ancient woodlands were living through events that would result in some stunning pieces that grace museums around the world. Some 14 million years ago in the Miocene, the area was thickly forested rather than displaying the arid environment of today. It was also much closer to sea level, since the area has been extensively uplifted since then, due to tectonic stresses caused by the subduction of the Pacific and Farallon plates under the North American one. The area also saw intense subduction related volcanism (ongoing along the USA’s west coast to this day), which periodically covered the forests in silica rich ash. As groundwater interacted with the magma below, weathering the layers of ash into clays, it dissolved silica, precipitating it when conditions such as temperature and pressure changed, replacing the ash covered trees with opal, sometimes so clearly that every cell is visible. While not really suitable for jewellery use due to its tendency to crack as it dries out (called crazing in the trade), these rare logs from the Virgin Valley of Nevada make for stunning collector’s specimens

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From walking around Lake Louise, Alberta.

Not every creature in the ocean is cute and cuddly – some are downright spooky! 

Anglerfish like this one in Monterey Bay National Marine Sanctuary lurk in the dark, waiting to lure prey in with the light atop their head. 

(Photo: MBARI)

It’s National Hippo Day, and this is all we got.

Sky Walk on Puente 3 (Bridge 3) in Monteverde, Costa Rica