Unleash your inner da Vinci with these art and science drawing lessons
Learn how to draw realistic figures for comic books, anatomy courses, and more.
- Masterpieces like the Mona Lisa and The Last Supper followed countless hours of anatomical studies.
- Leonardo da Vinci was fascinated by the human form.
- The Complete Creative Art & Science of Drawing Bundle teaches you how to draw human bodies, heads, and more.
Fans of the Mona Lisa and The Last Supper are captivated by Leonardo da Vinci's exceptional eye for human forms. Those masterpieces followed countless hours of anatomical studies. Da Vinci was fascinated by the human form, most famously expressed in his classic sketch The Vitruvian Man.
There are many ways of capturing human figures through drawing, from precise anatomical sketches to essences of characteristics. The Complete Creative Art & Science of Drawing Bundle will teach you how to draw a wide range of human bodies, heads, movement, perspective, and much more.
In this 12-course bundle, you'll learn how to draw 3D objects that appear to occupy space. A human figure drawing course instructs you on the basics of anatomical perspective. From there, you can home in on heads, one of the most challenging aspects of the human body to draw.
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No drawing bundle would be complete without a course on animals. In 31 lessons, you'll be given the tools to create the best cat memes around. Two courses on shading will also help you master depth. And if you're intrigued by digital drawing, a master class in creating fantasy art in Manga Studio 5 is included as well. In other words, you'll be well on your way to calling yourself an artist.
The Complete Creative Art & Science of Drawing Bundle is on sale now for $39.99, a 96% discount from the regular cost of $1,172.
Price subject to change.
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The main bioactive compound in catnip seems to protect cats from mosquitoes. It might protect humans, too.
- For centuries, humans have observed that cats exhibit strange behaviors when exposed to catnip and silver vine.
- A new study examined how the main bioactive compound in these plants affects cats' opioid systems and protects them against mosquito bites.
- The findings suggest that the compound nepetalactol could be used to develop new mosquito repellents for humans.
Nepeta cataria, commonly known as catnip
Johann Georg Sturm (Painter: Jacob Sturm) via WikiPedia/Public Domain<p>In the study, researchers from Iwate University in Japan exposed nepetalactol-laced paper to different types of felids, including domestic and feral cats, a leopard, two jaguars and two lynx. The team also exposed nepetalactol to dogs and mice, but only the cats elicited the expected behavioral response.</p><p>To find out why cats react uniquely to nepetalactol, the researchers measured the animals' endorphin levels before and after they were exposed to the substance. The results showed that nepetalactol raised endorphin levels in cats.</p><p>But when cats were given drugs that blocked opioid receptors, their endorphin levels didn't rise, and their behavior didn't change. This suggests that cats' "μ-opioid system is stimulated by an increase in endogenous β-endorphin secretion when olfactory neurons are activated by these iridoids," the team wrote.</p>
Nepetalactol as a mosquito repellent<p>To test the efficacy of nepetalactol as a mosquito repellant, the researchers anesthetized two groups of cats. For one group, the researchers applied nepetalactol to the cats' heads. The other group was left untreated to serve as a control. The researchers then exposed the cats to Asian tiger mosquitos and counted the number of times the insects bit each group.</p><p>The results showed that the group treated with nepetalactol was much less likely to get bitten, sometimes by as much as 50 percent. The same proved true in a "more natural" experiment, in which cats were allowed to rub their faces on the plants themselves.</p><p style="margin-left: 20px;">"This is convincing evidence that the characteristic rubbing and rolling response functions to transfer plant chemicals that provide mosquito repellency to cats," the team wrote.</p>
The world's deadliest animal<p>While the researchers don't fully understand why nepetalactol activates the μ-opioid system in cats, they think the compound could help humans avoid mosquito bites. After all, some of the study contributors have applied for a patent covering the use of nepetalactol as an insect repellent. Gizmodo <a href="https://gizmodo.com/cats-love-catnip-because-it-protects-them-from-mosquito-1846092518" target="_blank" rel="noopener noreferrer">reports</a> that the researchers even tried applying the compound to their arms, which seemed to prevent mosquito bites.</p><p>For thousands of years, humans have aimed to protect themselves from mosquitos. The Egyptian queen Cleopatra was said to sleep surrounded by a mosquito net. The Romans used vinegar mixtures. And Mississippians turned to the American beautyberry plant. </p><p>Today, DEET is the most widely used mosquito repellent, but it's slightly toxic and can cause side effects, including seizures, though rarely. Developing better mosquito repellents could save many lives. The World Mosquito Program <a href="https://www.worldmosquitoprogram.org/en/learn/mosquito-borne-diseases#:~:text=Nearly%20700%20million%20people%20contract,more%20than%20one%20million%20deaths." target="_blank">reports</a> that mosquito-borne illnesses like malaria and yellow fever affect more than 700 million annually and kill approximately one million. </p>
A unique exoplanet without clouds or haze was found by astrophysicists from Harvard and Smithsonian.
- Astronomers from Harvard and Smithsonian find a very rare "hot Jupiter" exoplanet without clouds or haze.
- Such planets were formed differently from others and offer unique research opportunities.
- Only one other such exoplanet was found previously.
Munazza Alam – a graduate student at the Center for Astrophysics | Harvard & Smithsonian.
Credit: Jackie Faherty
Jupiter's Colorful Cloud Bands Studied by Spacecraft<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="8a72dfe5b407b584cf867852c36211dc"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/GzUzCesfVuw?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
People often make a killing in stocks, but what else do people buy in hopes of selling for a fortune?
- Outside of stocks and bonds, some people make money investing in collectibles and make a fair amount on them.
- One stamp even sold for a billion times its face value.
- The extreme dependence on future collectability limits the potential of most of these opportunities.
Pokémon Cards<iframe width="730" height="430" src="https://www.youtube.com/embed/hVUmTaSoB5Y" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe><p> For those who weren't content to catch them all in a video game came a trading card game where you could collect them all. Some classic cards have gained tremendous stature among collectors and Pokéfanatics and sell for extremely high prices. </p><p> An older card featuring Charizard, a fire breathing dragon, regularly sells for thousands <a href="https://www.lifesuccessfully.com/gaming-articles/the-most-wanted-pokemon-cards-charizard#/" target="_blank" rel="noopener noreferrer">online</a>. Given that the card could be purchased for a couple of dollars in 1999, this is quite the return. A particular pack of the cards, which cost $5 in 2003, now sells for $650, one hundred and thirty times the original asking <a href="https://adamrybko.medium.com/stocks-or-pokemon-cards-an-introduction-to-alternative-investing-32fe499083c4" target="_blank" rel="noopener noreferrer">price</a>. </p><p> Of course, not every card will fetch these high prices. Buying cards as an investment is tricky. You have to essentially guess at which cards will be considered highly valuable at a later date and will be unable to collect any dividend before selling them.</p><p> Furthermore, you have to presume that people will be collecting the cards years after buying them. While Pokémon has remained popular, it is a bit of an outlier in terms of enduring success.</p>
Shoes<p> People from all walks of life, from skateboarders to the First Lady of the <a href="https://www.rappler.com/newsbreak/in-depth/imelda-marcos-shoes-mixed-legacy" target="_blank" rel="noopener noreferrer">Philippines</a>, enjoy collecting shoes. An entire subculture exists for people interested in collecting sneakers, and some people make quite a profit in it.</p><p> The Nike SB Dunk Low Reese Forbes Denims, priced initially at $65 in 2002, are commonly valued in the thousands of dollars now. The Nike Air Jordan 1 Retro High x Off White "Chicago" shoe sold for $190 a mere four years ago, but now sells for $4000 a <a href="https://sixfiguresneakerhead.com/sneaker-model-return-alternative-investment-stock-x-reseller/" target="_blank" rel="noopener noreferrer">pair</a>. </p><p> A <a href="https://www.huffpost.com/entry/sneakers-good-investment_n_5bd1f5ebe4b0d38b588143ee?guccounter=1&guce_referrer=aHR0cHM6Ly93d3cuZ29vZ2xlLmNvbS8&guce_referrer_sig=AQAAALOu0F9zs5DBHHOIjMgHOZR6K88W3rZkyD3ftBMz2nzlHfoxD4MS2Iz1vF3H-a4_xzOWIIrsJyv76Gj6xwUXaRIRdjq7M2m7I6-lxihWIcEfs7F9PgOwnx82JXPfXmWL7-RQlNUufOyvd8V6TCzMEYrEjzMXVU77IWk9MjOEtsln" target="_blank" rel="noopener noreferrer">Huffington Post</a> article points out that most of these shoes offered better returns than gold over the same period. The same article quotes YouTube personality <a href="https://www.youtube.com/user/mrFOAMERSIMPSON" target="_blank" rel="noopener noreferrer">Mr. Foamer Simpson</a> and his explanation of the difficulties of making money on shoes:</p><p style="margin-left: 20px;"> "There's a guessing game or element of unpredictability that makes it exciting for some collectors. With sneakers, you kind of never know. Sure, you know what sneakers are more limited or which ones were harder to get, but even with that, it fluctuates a lot. A sneaker that was very valuable two years ago might all of a sudden crash and no longer be valuable."</p>
Toys of all kinds<iframe width="730" height="430" src="https://www.youtube.com/embed/0uYnj1i1EQw" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe><p> If there's one thing everybody loves, it's what they loved when they were children. That often translates into old and rare toys fetching insane prices at auction.</p><p> Beanie Babies, those little stuffed animals from the 90s, once sold at a price of thousands of dollars <a href="https://www.thefiscaltimes.com/2015/03/02/How-Great-Beanie-Baby-Bubble-Went-Bust" target="_blank" rel="noopener noreferrer">online</a>, not bad considering they sold for $5. Lego sets, particularly those featuring well-known franchises like Star Wars, can sell for hundreds of dollars <a href="https://finance.yahoo.com/news/20-geeky-collectibles-could-millions-201624881.html" target="_blank" rel="noopener noreferrer">online</a>. </p><p> As with Pokémon cards, the success stories are dependent on what people are interested in collecting long after most people forgot the toy existed.<strong> </strong>While some collectors have ideas on how to gauge what might or might not end up being valuable later, there seems to be a considerable amount of luck involved.</p>
Stamps<p> The hobby of kings has occasionally made some people as rich as one, with rare stamps and extensive collections fetching high prices at auction.</p><p> One of the famous "Inverted Jenny," stamps, a rare misprint showing an upside-down airplane, sold for $1,593,000 at <a href="https://www.linns.com/news/us-stamps-postal-history/2018/november/nov-15-jenny-invert-sale-record.html" target="_blank" rel="noopener noreferrer">auction</a>. The most valuable stamp in the world, the British Guiana 1c magenta, last sold for $9,480,000, a billion times its face <a href="http://www.sothebys.com/en/auctions/2014/magenta-n09154.html" target="_blank" rel="noopener noreferrer">value</a>. For those interested in a shorter-term investment, the USA Forever stamp has gained a face value of 75% since its introduction and can still be used to send a letter.</p>
Coins<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNTUxNjY2Ny9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTYzMjUwNzk3OX0.HMBXb1mbiL0D-JbFcD7pBWNZ8TcOB4mzcJ6ri2aCNOg/img.jpg?width=1245&coordinates=0%2C1%2C0%2C1&height=700" id="41fe2" class="rm-shortcode" data-rm-shortcode-id="57f1ae74688caf29e150c4ce2f7c5b41" data-rm-shortcode-name="rebelmouse-image" data-width="1245" data-height="700" />
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