Exceptionally high-quality videos allow scientists to formally introduce a remarkable new comb jelly.
- Gorgeous simplicity characterizes the comb jelly recently discovered by National Oceanic and Atmospheric Administration Fisheries.
- The small denizen of the deep was spotted three times beneath the waters off Puerto Rico.
- Though it's unusual to formally identify an animal strictly based on video observations, the quality of NOAA's video made it possible in a case where there's no better alternative.
Meet cute beneath the waves<p>The first encounter humanity had with the jelly<em> </em>occurred on April 10, 2015, when Deep Discoverer (a remotely operated vehicle or ROV) came across the gelatinous wonder. Fortunately, the ROV sports cameras that were sufficiently high-definition to clearly capture <em>Duobrachium sparksae's</em> fine details.</p><p>The animal was first noticed in a video feed by Mike Ford of the shoreside science team working in NOAA's Exploration Command Center far away, outside of Washington, D.C. The ROV was working the Arecibo amphitheater canyon. What Ford saw was, in his words, "a beautiful and unique organism."</p><p>Deep Discoverer's cameras produce externally high-resolution images, and are capable of measuring objects as small as a millimeter.The comb jelly's body is about 6 centimeters in size, and its tentacles are about 30 cm long.</p><p>While video-based animal identification can be controversial, there was little choice in this case. "We didn't have sample collection capabilities on the ROV at the time," says Collins. "Even if we had the equipment, there would have been very little time to process the animal because gelatinous animals don't preserve very well; ctenophores are even worse than jellyfish in this regard."</p><img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDg0ODEwNy9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY2NjA0MjMxMH0.X3YXqsUtddtArtXOz7z5w-Zli0Z2vCE1UoSRLU63898/img.jpg?width=980" id="fffe5" class="rm-shortcode" data-rm-shortcode-id="5b42f13f528c33eeaeb512320cac7f23" data-rm-shortcode-name="rebelmouse-image" data-width="1232" data-height="1440" />
Credit: Nicholas Bezio/NOAA Office of Ocean Exploration and Research
Describing Duobrachium sparksae<p>All told, three individuals were observed by the scientists in three separate encounters with the ROV. The image at the top of this article is from the second encounter. The fact that three separate examples were easily spotted leaves scientists hopeful that the creature is not a rarity in the seas.</p><p>Ford describes what they saw:</p><p style="margin-left: 20px;">"The ctenophore has long tentacles, and we observed some interesting movement. It moved like a hot air balloon attached to the seafloor on two lines, maintaining a specific altitude above the seafloor. Whether it's attached to the seabed, we're not sure. We did not observe direct attachment during the dive, but it seems like the organism touches the seafloor."</p><p>The role that <em>Duobrachium sparksae</em> plays in its ecosystem is not yet understood.</p><span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="83f6005db2fc4b5e7ec6fc207ff70639"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/o0nkwCKpaRA?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
Finding a place in the family<p>The manner in which light refracted prismatically off the jelly's cilia combs immediately placed it in the ctenophore family as a start.</p><p>Collins explains, "We don't have the same microscopes as we would in a lab, but the video can give us enough information to understand the morphology in detail, such as the location of their reproductive parts and other aspects."</p><p>"We went," says Ford, "through the historical knowledge of ctenophores and it seemed clear this was a new species and genus as well. We then worked to place it in the tree of life properly."</p><p>The videos—the only "specimens" there are of <em>Duobrachium sparksae</em>—are now publicly accessible as part of the Smithsonian National Museum of Natural History Collection.</p>
Researchers document the first example of evolutionary changes in a plant in response to humans.
- A plant coveted in China for its medicinal properties has developed camouflage that makes it less likely to be spotted and pulled up from the ground.
- In areas where the plant isn't often picked, it's bright green. In harvested areas, it's now a gray that blends into its rocky surroundings.
- Herbalists in China have been picking the Fritillaria dealvayi plant for 2,000 years.
Fritillaria dealvayi<p>The plant is <em> </em><a href="http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200027633" target="_blank"><em>Fritillaria dealvayi</em></a><em>,</em> and its bulbs are harvested by Chinese herbalists, who grind it into a powder that treats coughs. The cough powder sells for the equivalent of $480 per kilogram, with a kilogram requiring the grinding up of about 3,500 bulbs. The plant is found in the loose rock fields lining the slopes of the Himalayan and Hengduan mountains in southwestern China.</p><p>As a perennial that produces just a single flower each year after its fifth season, it seems <em>Fritillaria</em> used to be easier to find. In some places its presence is betrayed by bright green leaves that stand out against the rocks among which which it grows. In other places, however, its leaves and stems are gray and blend in with the rocks. What's fascinating is that the bright green leaves are visible in areas in which Fritillaria is relatively undisturbed by humans while the gray leaves are (just barely) visible in heavily harvested areas. Same plant, two different appearances.</p><div id="19cbf" class="rm-shortcode" data-rm-shortcode-id="c68d3086f5411ffd951edaad1cb811b9"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1329832938985435138" data-partner="rebelmouse"><div style="margin:1em 0">2/2: The picture on the left shows a Fritillaria delavayi in populations with high harvest pressure, and the one on… https://t.co/oriBNZGcsV</div> — University of Exeter News (@University of Exeter News)<a href="https://twitter.com/UniofExeterNews/statuses/1329832938985435138">1605891854.0</a></blockquote></div>
How we know we're the cause<p>There are other camouflaging plants, but the manner in which <em>Fritillaria</em> has developed this trait strongly suggests that it's a defensive response to being picked. "Many plants seem to use camouflage to hide from herbivores that may eat them — but here we see camouflage evolving in response to human collectors."</p><p>"Like other camouflaged plants we have studied," Niu says, " we thought the evolution of camouflage of this fritillary had been driven by herbivores, but we didn't find such animals." His close examination of Fritillaria leaves revealed no bite marks or other signs of non-human predation. "Then we realized humans could be the reason."</p><p>In any event, says Professor Hang Sun the Kunming Institute, "Commercial harvesting is a much stronger selection pressure than many pressures in nature."</p><img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDgyNzM0My9vcmlnaW4ucG5nIiwiZXhwaXJlc19hdCI6MTYzMDc3NDQwMn0.lXwsG0ShcnMcVLl06APdEeEOY5_WOs4UfN8oVCKsgtc/img.png?width=980" id="ccc8e" class="rm-shortcode" data-rm-shortcode-id="907e152dd5ad0429aa6350c53f5a85aa" data-rm-shortcode-name="rebelmouse-image" alt="herb shop" data-width="2448" data-height="1377" />
Credit: maron/Adobe Stock
The study<p>Since herbalists have been plucking <em>Fritillaria</em> from the rocks for 2,000 years, one might hope a record would exist that could allow researchers to identify areas in which the plant has been most thoroughly picked. There is no such documentation, but Liu and Stevens were able to acquire this type of information for five years (2014–2019), tracking the harvests at seven <em>Fritillaria</em> study sites. This allowed them to identify those areas in which the plant was most heavily harvested. These also turned out to be the locations with the gray-leaf variant of <em>Fritillaria</em>.</p><p>Further supporting the scientists' conclusion that gray <em>Fritillaria</em> was more likely to evade human hands and live long enough to reproduce was that participants in virtual plant-identification tests confirmed the species was hard to spot in the wild.</p><p>"It's possible that humans have driven evolution of defensive strategies in other plant species, but surprisingly little research has examined this," Stevens notes.</p><p>Hang Sun says such studies make clear that humans have become drivers of evolution on our planet: "The current biodiversity status on the earth is shaped by both nature and by ourselves."</p>
A 71% wet Mars would have two major land masses and one giant 'Medimartian Sea.'
- Sci-fi visions of Mars have changed over time, in step with humanity's own obsessions.
- Once the source of alien invaders, the Red Planet is now deemed ripe for terraforming.
- Here's an extreme example: Mars with exactly as much surface water as Earth.
Misogynists in space<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzU1ODkzMS9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTYyNDEzMzY4OX0.XEEPJJnp75idUXzutmJ5ZGo35WYKxmVEyIiSwDpMeE4/img.jpg?width=980" id="6c715" class="rm-shortcode" data-rm-shortcode-id="2210c6d8590f7886eb6e4a89bcd6a50e" data-rm-shortcode-name="rebelmouse-image" alt="\u200bMars \u2013 and Martians \u2013 were a staple of 1930s pulp science fiction." data-width="1032" data-height="1377" />
Mars – and Martians – were a staple of 1930s pulp science fiction.
Image: ScienceBlogs.de - CC BY-SA 2.0<p><em>"Oh, my God, it's a woman," he said in a tone of devastating disgust. </em></p><p><em></em>"Stowaway to Mars" hasn't aged well. First serialised in 1936 as "Planet Plane" and set in the then distant future of 1981, the fourth novel by sci-fi legend John Wyndham (writing as John Benyon) could have been remembered mainly for its charming retro-futurism, if it weren't so blatantly, offhandedly misogynistic. </p><p>Fortunately, each era's sci-fi says more about itself than about the future. That also goes for how we see Mars. 'Classic' Martians, like the ones in H.G. Wells' "War of the Worlds," are creatures from a dying planet, using their superior firepower to invade Earth and escape their doom. That trope reflected 19th- and 20th-century fears about mechanized total warfare, which hung like a sword of Damocles over otherwise increasingly placid lifestyles. </p><p>Closer inspection of the Red Planet has revealed the absence of green men; and now <em>we're </em>the dying planet – pardon my Swedish. So the focus has shifted from interplanetary war to terraforming the fourth rock from the Sun, creating something all those protest signs say we don't have: a Planet B. <span></span></p>
How to keep Mars from killing us<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzU1ODkzNC9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTYzOTgyNTcwNX0.V7I3VFPch0oV8YDx95ZLLZFY7zEcyqSiG5uCAiMu2hg/img.jpg?width=980" id="f092e" class="rm-shortcode" data-rm-shortcode-id="5ca3b60a81a5f003a3e1ef467cf95f1a" data-rm-shortcode-name="rebelmouse-image" alt="Map of the surface of the planet Mars, showing the ice caps at the poles." data-width="1000" data-height="500" />
Mars today: red and dusty, dead and deadly.
Image: NASA - public domain.<p>Cue Elon Musk, who doesn't just build Teslas but also heads SpaceX, a program to make humanity an interplanetary species by landing the first humans on Mars by 2024 as the pioneers of a permanent, self-sufficient and growing colony.</p><p><span></span>Such a colony would benefit from an environment that doesn't try to kill you if you take off your space helmet. Martian temperatures average at around -55°C (-70°F), and its atmosphere has just 1 percent the volume of Earth's, in a mix that contains far less oxygen. Changing all that to an ecosystem that's more like our own, would be a herculean task. </p>
From Red Mars to Green Mars<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzU1ODk0NC9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTYxNTE0NjA5N30.iloUVThQOBjnkP7HuLefzPlOeIDE8wOlfcXMQ7ZYDMw/img.jpg?width=980" id="f9ad2" class="rm-shortcode" data-rm-shortcode-id="05032082590ebcf98a6830576ae3815e" data-rm-shortcode-name="rebelmouse-image" alt="\u200bBefore and after images of a terraformed Mars" data-width="3072" data-height="2128" />
Before and after images of a terraformed Mars in the lobby of SpaceX offices in Hawthorne, California.
Image: Steve Jurvetson / Flickr - CC BY 2.0<p>So how would Musk go about it? In August 2019, he launched a t-shirt with the two-word answer: 'Nuke Mars'. The idea would be to heat up and release the carbon dioxide frozen at Mars's poles, creating a much warmer and wetter planet – as Mars may have been about 4 billion years ago – though still not with a breathable atmosphere.</p><p>Alternatives to nuclear explosions: photosynthetic organisms on the ground or giant mirrors in space, either of which could also melt the Martian poles. However, many scientists question the logistics of these plans, and even whether there is enough readily accessible CO2 on Mars to fuel the climate change that Musk (and others) envision. </p><p>Ah, but why stop at the objections of the current scientific consensus? Sometimes, you have to dream ahead to see the place that can't be built yet. In the lobby of SpaceX HQ in Hawthorne, California, Red Mars and Green Mars are shown side by side. The terraformed version on the right looks green and cloudy and blue – Earth-like, or at least habitable-looking.<span></span></p>
Or how about a Blue Mars?<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzU1ODk1MS9vcmlnaW4ucG5nIiwiZXhwaXJlc19hdCI6MTY2ODk3ODU4OX0.tt338NlTV_xfgLR_WQ2wfbu9PxbpGO69NEAURVxjY6o/img.png?width=980" id="9a33f" class="rm-shortcode" data-rm-shortcode-id="b3325bff53cb4b13cf77bff877961338" data-rm-shortcode-name="rebelmouse-image" alt="wet Mars map" data-width="1264" data-height="632" />
A map of Mr Bhattarai's wet Mars, in the Robinson projection.
Image: A.R. Bhattarai, reproduced with kind permission; modified with MaptoGlobe<p>But why stop there? This map looks forward to a Mars that doesn't just have some surface water, but exactly as much as Earth – which means quite a lot. No less than 71 percent of our planet's surface is covered by oceans, seas, and lakes. The dry bits are our continents and islands. </p><p><span></span>In the case of Mars, a 71 percent wet planet leaves the planet's northern hemisphere mainly ocean, with most of the dry land located in the southern half. </p><p><span></span>Most of the dry land is connected via the south pole but is articulated in two distinct land masses. Both semi-continents are separated by a wide bay that corresponds to Argyre Planitia. </p><p><span></span>The one in the west is centered on Tharsis, a vast volcanic tableland. To the north, attached to the main land mass, is Alba Mons, the largest volcano on Mars in terms of area (with a span comparable to that of the continental United States). </p><p><span></span>It's about 6.8 km (22,000 ft) high, which is about one-third of Olympus Mons, a volcano now located on its own island off the northwest coast of Tharsis. At a height of over 21 km (72,000 ft), Olympus Mons is the highest volcano on Mars and the tallest planetary mountain (1) currently known on the solar system. Olympus rises about 20 km (66,000 ft) above the sea level as shown on this map.</p>
A new civilization<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzU1ODk1Ni9vcmlnaW4uZ2lmIiwiZXhwaXJlc19hdCI6MTYyMDEwNzQ0Nn0.vKa0nNqKdMTfWYG6behUPPg9giToq3Lx6CsWQ70eqCE/img.gif?width=980" id="7f62c" class="rm-shortcode" data-rm-shortcode-id="bcffffaf301663a42758cf4cb8e11a76" data-rm-shortcode-name="rebelmouse-image" alt="\u200bSpinning globe view of Mr Bhattarai's wet Mars." data-width="1000" data-height="513" />
Spinning globe view of Mr Bhattarai's wet Mars.
Image: A.R. Bhattarai, reproduced with kind permission; modified with MaptoGlobe<p>Mars's eastern continent is centered not on a plateau, but on a depression that on today's 'dry' Mars is called Hellas Planitia, one of the largest impact craters in the Solar system. On the 'wet' Mars of this map, the crater is the central and largest part of a sea that is surrounded by land, a Martian version of the Mediterranean Sea. Perhaps one day this Medimartian Sea will be the Mare Nostrum of a new civilization. </p><p>To the northeast of the circular semi-continent is a large island that on 'our' Mars is Elysium Mons, a volcano that is the planet's third-tallest mountain (14.1 km, 46,000 ft).</p><p>The map is the work of Aaditya Raj Bhattarai, a civil engineering student at Tribhuvan University in Kathmandu (Nepal). Talking to <a href="https://www.inverse.com/innovation/mars-with-water-map" target="_blank" rel="dofollow">Inverse</a>, he said he hoped his map could help further the Martian plans of Elon Musk and SpaceX: "This is part of my side project where I calculate the volume of water required to make life on Mars sustainable and the sources required for those water volumes from comets that will come nearby Mars in the next 100 years."<br></p><p><br></p><p><strong></strong><em>Images by Mr Bhattarai reproduced with kind permission. Check out <a href="https://aadityabhattarai.com.np/" target="_blank">his website</a>. </em><em>Planetary projection and spinning globe created via <a href="https://www.maptoglobe.com/" target="_blank">MaptoGlobe</a>.</em></p><p><strong>Strange Maps #1043</strong></p><p><em>Got a strange map? Let me know at </em><a href="mailto:email@example.com">firstname.lastname@example.org</a><em>.</em></p><p>________<br>(1) The tallest mountain in the Solar system, planetary or otherwise, we know of today, is a peak which rises 22.5 km (14 mi) from the center of the Rheasilvia crater on Vesta, a giant asteroid which makes up 9 percent of the entire mass of the asteroid belt. <br></p>
Avocado evolved in the warming climates of Central America during the Neogene period, roughly 10 million years ago.
Given avocado's popularity today, it's hard to believe that we came close to not having them in our supermarkets at all.
The planet that we are searching for is a little bit smaller and closer than we originally thought.
- Years ago, California Institute of Technology professor Konstantin Batygin was inspired to embark on a journey of discovering what lurked beyond Neptune. What he and his collaborator discovered was a strange field of debris.
- This field of debris exhibited a clustering of orbits, and something was keeping these orbits confined. The only plausible source would be the gravitational pull of an extra planet—Planet Nine.
- While Planet Nine hasn't been found directly, the pieces of the puzzle are coming together. And Batygin is confident we'll return to a nine-planet solar system within the next decade.