Making Geometric Images with a Smart Phone and a Teleidoscope

In 1817, Scottish inventor and optical scientist Sir David Brewster invented a tube with opposing mirrors running through it and beads of colored glass in one end. He called it the “kaleidoscope,” a word whose Greek roots mean “beautiful shape viewer,” which most of us have peered through and hooted in awe at around kindergarten age. It’s a simple design that capitalizes on a trick of light to incredible effects. Three mirrors arranged in a triangle reflect the light entering one end of the scope down the tube and across to each other. By the time it reaches your eye, it has reflected so many times it creates the effect of a precise geometric pattern that infinitely changes.

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Sir David Brewster.

Back in the nineteenth century, when optics were a new thing, this wasn’t just awe-inspiring for children; even adults were impressed. But Sir Brewster neglected to patent his kaleidoscope, and others copied the new technology and began manufacturing it as a child’s toy, likely costing him millions in potential income and in reputation. Good thing he had other inventions to lean on.

Sir Brewster is responsible for inventing the first portable 3D viewing device, which he called the “lenticular stereoscope.” He built the first binocular camera, the lighthouse illuminator, the polyzonal lens, and two types of polarimeters, a scientific instrument used to measure the angle of rotation caused by passing light through an optically active substance. This last device is used in the chemical industry to test the properties of new substances.

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John Lyon Burnside, III.

In 1972, the kaleidoscope’s potential was pushed a step further. John Lyon Burnside, III and Harry Hay patented a version of the geometry-creating tube that scrapped the bits of colored glass and replaced it with a spherical lens, allowing the viewer to point the viewing tube at any object in nature to see it reduplicated across the mirrors in the same way. They dubbed it the “teleidoscope.”

MirrorKit

At the Houston Museum of Natural Science, we sell both kaleidoscopes and teleidoscopes in the Museum Store. As a lover of photography, nature and geometric patterns, I experimented with this teleidoscope and my iPhone and captured some amazing images in the Cockrell Butterfly Center, the Cullen Hall of Gems and Minerals, and other locations around the museum. Some things work better than others, but for the most part, everything looks incredible through one of these bad boys.

Here’s how you do it, in photo steps. (You can get this awesome notebook at the Museum Store, as well.)

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Grab a cool thing to take a photo of (or just go outside), and bring your teleidoscope and your smart phone or digital camera.

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Hold the viewing end of the teleidoscope against the lens of your smart phone or digital camera. Make sure it’s tight and that there’s no light leaking around the edges. It takes some practice, but you’ll learn quickly.

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Align your shot and snap it when you see a pattern you like. The edges will appear darker than the center. This is yet another property of light as it bounces around inside the scope.

And here are some of the images I made, cropped down to a square, eliminating the dark edges. What do you think?

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Roof of the Cockrell Butterfly Center.

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Mandrake the Corpse Flower.

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Andelusite.

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Green fluorite and white barite.

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Pink phalaenopsis orchid.

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Orchid mantis.

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Owl butterfly.

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Rice paper butterfly.

MirrorSandstoneConcretion

Sandstone concretion.

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Spondylus shell.

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Orchid.

MirrorSquid

Giant squid model.

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Orchid.

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Zebra longwing butterfly.

Everything looks better through a teleidoscope! So buy one or make your own, and post your images on our social media. Your images look even better with Instagram filters! Don’t forget to tag us with #hmns and @hmns. We’d love to see what you come up with.

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Earlier photo through Instagram’s Juno filter, with a few other adjustments I’ll keep secret. ;)

Come to HMNS After Dark for a Sweet Surprise!

You may use artificial sweeteners in your tea or coffee, maybe even sprinkle some on your food, but there’s nothing quite like the miracle fruit to make sour foods more palatable. Just gnaw on one of these berries for a minute, let the juice coat your tongue, and for up to an hour, everything from plain yogurt to lemons to Sour Patch Kids taste just as sugary as Lucky Charms!

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Meet the berries of the miracle fruit plant (Synsepalum dulcificum). After eating just one, everything else tastes a little bit sweeter for up to an hour.

Here’s how it works: the berries of the Synsepalum dulcificum plant, which we cultivate in the Cockrell Butterfly Center at the Houston Museum of Natural Science, contain a protein named miraculin after the effect they have on your taste buds. The protein confuses the sensitivity of the sweet and sour-tasting areas of your tongue, tricking your mouth into thinking certain foods are filled with sugar. That’s right… If you munch a miracle berry, you can eat a whole pile of lemons without making a face! But be careful. Your tongue might be fooled, but your stomach will know the difference.

Because we’ve just harvested a crop of these miracle berries from our own miracle fruit plant, we’re offering an opportunity for you to try this magical plant out for yourself. Come to HMNS After Dark next Wednesday, March 30, from 5 to 9 p.m. and visit the booth outside the CBC to try a berry and experiment with its effects. We’ll give away both berries and snacks to sample along with them completely free to guests enjoying our new after-hours schedule!

FruitCacao

This is the seed pod of a cacao tree (Theobroma cacao), from which we make cocoa butter and chocolate. Inside this pod are fats, oils, and cocoa beans.

While you’re snacking, pop into the CBC to visit our incredible butterfly collection and see how other kinds of tropical fruit grow. You may now know it, but we grow papaya, pineapple, bananas, cocoa and coffee right here in the museum, along with several other kinds of exotic edibles! It’s another way you can learn about the interaction between pollinating insects and the plants that need their help to produce fruit. Check out these photos of fruit-producing specimens, taken right in our own rainforest!

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Coffee beans (Coffea arabica), not to be confused with cocoa, grow individually. Once the fruit is removed, the bean is roasted and then ground to make America’s favorite hot beverage.

FruitPapaya

Papaya trees (Carica papaya) bear their fruit in a row along the main stem. Except for the yellow one at the bottom, these are still far from ripe.

FruitPina

It looks like the large pineapple in back is sneaking up on the smaller one in front. Pineapple plants (Ananas comosas) are a terrestrial bromeliad.

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These red bananas (Musa acuminata) aren’t ripe yet, but they won’t grow much bigger than this. They’ll just turn red.

That’s it for the familiar ones. Have you heard of these three below?

FruitMonstera

Yes, this is an edible fruit! It’s called Monstera deliciosa, which grows in Central and South America.

FruitSapodilla

The sapodilla plant (Manilikara zapota), bears fruit that looks similar to a kiwi, but is orange inside.

FruitStinky

The noni fruit (Morinda citrifolia), also known as the cheese fruit or vomit fruit, is edible, but it produces a foul odor that makes eating it quite unpleasant.

 

Some other fruiting plants in our collection aren’t producing at the moment, but are still worth a look. Keep your eyes peeled for the vanilla orchid, avocado, starfruit, rose apple, guanábana, and guava. Whatever you find, in the CBC at HMNS After Dark, you can definitely expect a sweet surprise.

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Our butterflies are some of the most spectacular on earth, and without them, many of these fruits would never reach maturity. So next time you’re at the CBC, thank a butterfly!

Seeing Stripes: The Zebra Longwing Butterfly

The zebra longwing (Heliconius charithonia) is a common resident of the Cockrell Butterfly Center (CBC). This butterfly is easily recognizable with boldly striped yellow and black wings. When visiting the CBC, you’ll often spot them sipping nectar from the flowers and nectar feeders or sunning themselves with their wings spread open. These butterflies have some unique features and behaviors that set them apart form the rest!

Aposematic Coloration

Bright, contrasting warning colors are known as aposematic coloration. They indicate to potential predators of the “unprofitability” of a prey item. The bold yellow and black stripes on the zebra longwing serve as a warning signal to potential predators of the butterfly’s unpalatable and poisonous nature. Zebra longwing caterpillars feed on passion vine (passiflora) leaves and acquire some of their toxins, making them distasteful to predators. 

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Bright, contrasting colors warn predators to stay away.

Pollen feeders

Most butterflies can only sip fluids with their proboscis, most commonly flower nectar. Zebra longwings, on the other hand, also feed on pollen. They use their saliva to dissolve the pollen and take in its nutrients. Pollen, unlike nectar, contains proteins and is very nutritious. Pollen feeding is correlated with overall higher fitness. This diet allows zebra longwings to live longer (up to six months) and increases females’ egg production. 

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You can see pollen on this zebra longwing’s proboscis. Feeding on pollen increases longevity.

Pupal Mating

Male zebra longwings exhibit pupal mating, zebra_longwing_and_chrysaliin which they will mate with a female before and immediately after she emerges from her chrysalis. Males will seek out a female pupae and will perch on it and guard it from competing males. Many males may fight for the opportunity to mate with the yet-to-emerge female. The successful male will insert his abdomen into the softening pupae and copulate with the female. Mating will continue as she emerges and dries her wings. The males will pass a nutrient-rich spermatophore to the female which reduces her attractiveness to future mates. This male (at right) begins mating with the female before she has even emerged from her chrysalis.

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This mating pair shows the freshly emerged female still clinging to her chrysalis.

Communal Roosting

Adult zebra longwings roost communally in groups of up to 60 individuals at night. They tend to return to the same roost on a nightly basis. In the late afternoon, zebras can be observed fluttering and basking near their roost site as they slowly gather together for the night. Roosting together provides protection from predators and retains warmth. 

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These zebra longwings are preparing for the night by roosting together for safety.

So now you know! These beautiful, brightly colored butterflies are bad-tasting, and long-lived. They have unique mating habits and the snuggle together at night. Something to remember next time you visit the zebras at the CBC!

Staff Picks: Best of the Cockrell Butterfly Center

The Cockrell Butterfly Center (CBC) is most well known for its free-flying butterflies inhabiting a three-story indoor rainforest. But there are many other cool things to see and experience at the CBC! We checked with staff members and asked them about their favorite sections of the center, and this is what they said:

Lauren – Lauren is the butterfly entomologist and she takes care of the 800 to 1,000 imported butterflies we receive every week. Her staff picks are the chrysalis emergence chambers. The emergence chambers showcase thousands of live chrysalids of every size, shape and color imaginable! Many have gold spots or flecks. The word “chrysalis” comes from the Greek word for gold, “chrysós.” If you watch carefully you can even observe butterflies emerging, leaving an empty chrysalis shell behind, which they cling to while their wings stretch and dry.

lauren with chrysalids

Lauren stands next to the chrysalis chambers where you can watch butterflies as they emerge.

Erin – Erin is a board certified entomologist and is the insect zoo manager. She cares for all the non-butterfly bugs in the CBC. Her staff pick is the eastern lubber grasshopper sculpture found at the entrance of the entomology hall. The larger-than-life sculpture shows the anatomical details of the grasshopper’s body parts on one side, like the head, thorax, abdomen, wings and antennae. On the other side it shows a cross-section, displaying the insect’s internal organ systems. It’s a great visual introduction of what makes an insect, an insect. 

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Erin with the Eastern Lubber grasshopper sculpture you can enjoy in the CBC entomology hall.

Nancy – Nancy is the director of the CBC. Her staff-pick is spicebush caterpillar sculpture found in the entrance of the butterfly center. The giant caterpillar welcomes each visitor into the butterfly center and is a great opportunity for photos! It may seem cartoon-ish, but the sculpture is actually a very realistic representation of the caterpillar that can be found right here in Houston! The large eye-spots on the back of the caterpillar function to trick or scare away predators by making it appear like a bigger animal. 

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Nancy with the spicebush swallowtail caterpillar that greets guests as they enter the CBC.

Soni – Soni is the horticulturist that grows and cares for all of the plants in the CBC rainforest. Her staff pick is the Pride of Trinidad tree in the rainforest. The Pride of Trinidad (Warszewiczia coccinea) is native to Central and South America and the West Indies and is the national tree of Trinidad. The best part of this tree are its showy, flowering branches. Each flower cluster is accented with a red bract and is loaded with nectar. Inside the CBC rainforest, the Pride of Trinidad is in bloom year round and is constantly feeding a variety of butterflies! 

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Soni shows off a cluster of flowers on the Pride of Trinidad that feeds many of the butterflies in the CBC rainforest.

Ryan – Ryan is the CBC Bugs-On-Wheels outreach presenter. He travels to schools, day-cares, camps, and clubs to present a variety of bug-related topics (check them out here: Bugs-On-Wheels). His staff pick is the vinegaroon (Mastigoproctus giganteus). This scary looking arachnid is actually quite harmless and easy to handle. They get their name from their defense mechanism. If threatened, glands near the rear of the abdomen can spray acetic acid which has a vinegar-y smell and may dissuade predators from making the vinegaroon their lunch!

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Ryan holds a vinegaroon showing their relatively docile nature.

Farrar – Farrar is the curatorial entomologist. He identifies and documents the thousands of species in the CBC’s entomology collection. His staff-pick is the beetle specimen display in the entomology hall. Beetle species make up almost 25 percent of all known animal species. They are found in almost all major natural habitats and are adapted to practically every kind of diet. The British biologist and atheist J.B.S. Haldane once said, when asked whether studying biology had taught him anything about the Creator: “I’m really not sure, except that He must be inordinately fond of beetles.” This quote lines the top of the beetle display in the CBC. 

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Farrar stands next to the beetle specimen display you can visit in the CBC entomology hall.

Celeste – Celeste is the butterfly rearing coordinator. She breeds and raises butterflies for the CBC. Her staff pick is Charro, the CBC’s resident iguana! Charro is a Green Iguana (Iguana iguana). Despite this name, he is actually bright orange! Green Iguanas can be a variety of colors depending on what region they come from. Charro can be found relaxing in his enclosure in the rainforest or sunning himself outside the butterfly center by the demo garden. After hours, Charro gets to wander the entire rainforest freely. Don’t worry about the butterflies; Charro is strictly vegetarian. 

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Celeste sits with Charro the iguana who resides inside the CBC rainforest.

Next time you visit the CBC make sure to check out all these staff picks, and take time to pick YOUR favorite part of the CBC!