from the world's big
Dinosaur killing meteor hit Earth at 'worst possible angle'
You think you've had a day where everything that went wrong could? T-Rex has you beat.
- A new study suggests that the object that brought about the end of the dinosaurs crashed into the Earth at a 60-degree angle.
- This is about the worst possible angle for such an impact.
- The findings also help explain the nature of the impact crater in Yucatan.
A new study out of the Imperial College in London and published in Nature Communications suggests that the asteroid impact that wiped out the dinosaurs struck just the right place at just the right angle to be as utterly catastrophic as it was for the three-quarters of the planet's species that it wiped out.
Talk about bad luck
The angle of an asteroid impact can have effects on the aftermath every bit as dramatic as increasing or decreasing the size of the asteroid itself.
According to the findings of this study, the asteroid struck Earth at around sixty degrees. At that angle, the amount of climate-changing gas released by the impact is up to three times higher than the amount released by an impact at a lower one. The result of this was a global impact winter that doomed the dinosaurs and took a fair amount of other plant and animal life down with them.
Had it struck at a lower angle, the force of the impact would have been dispersed more widely in more shallow layers of rock, sending fewer gasses into the air. A review of most craters suggests that impactors tend to come in at low angles. The odds of one coming in at sixty degrees or above is just one in four.
This was made worse by the location, just off the coast of what is now Yucatan. Gypsum deposits at the impact site would have released vast amounts of sulfur gas into the atmosphere, as described above. If the impact site had been somewhere else with a different geological makeup, fewer climate-altering gasses would have been released by the impact.
Sometimes, you just can't win.
The result of this perfect storm of high impact angle and sulfate laden location was apocalyptic. The impactor, assumed in this study to be a 12 kilometers (7 miles) wide asteroid made of granite, slammed into the Earth at terminal velocity. It blew a hole in the crust perhaps 30 kilometers (19 miles) deep, and sent up mountains of fluidized rocks to rival the Himalayas before they collapsed.
Endless supplies of vaporized sulfur were released into the atmosphere, severely reducing the amount of solar radiation reaching the Earth. Some estimates suggest this was severe enough to make photosynthesis impossible.
How do we know all this? I mean, it was 65 million years ago, and the dinosaurs didn't leave notes.
We do know what the impact crater looks like; you can see it for yourself in the Yucatan. The part that is on land is known for its sinkholes, which map out the impact site. If you know that you can model a variety of scenarios and compare them to the conditions we see. If they match, we have a winner. This is what the scientists did.
Professor Collins of the Imperial College of London and the lead author of this study explained the results: "If you run the model at different impact angles, at 30 degrees and at 45 degrees, say, you can't match the observations - you get centres of mantle uplift and of the peak ring on the downrange side of the crater centre. And for a straight overhead impact, at 90 degrees, the centres are all on top of each other. So, that's doesn't match the observations, either."
As a result, we know that if the angle of impact was flatter it would have produced different effects, and the people reading this might be advanced dinosaurs rather than intelligent apes. Likewise, Yucatan might not have its famous, beautiful sinkholes.
Now that would be a tragedy.
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Educators and administrators must build new supports for faculty and student success in a world where the classroom might become virtual in the blink of an eye.
- If you or someone you know is attending school remotely, you are more than likely learning through emergency remote instruction, which is not the same as online learning, write Rich DeMillo and Steve Harmon.
- Education institutions must properly define and understand the difference between a course that is designed from inception to be taught in an online format and a course that has been rapidly converted to be offered to remote students.
- In a future involving more online instruction than any of us ever imagined, it will be crucial to meticulously design factors like learner navigation, interactive recordings, feedback loops, exams and office hours in order to maximize learning potential within the virtual environment.
A leading British space scientist thinks there is life under the ice sheets of Europa.
- A British scientist named Professor Monica Grady recently came out in support of extraterrestrial life on Europa.
- Europa, the sixth largest moon in the solar system, may have favorable conditions for life under its miles of ice.
- The moon is one of Jupiter's 79.
Neil deGrasse Tyson wants to go ice fishing on Europa<div class="rm-shortcode" data-media_id="GLGsRX7e" data-player_id="FvQKszTI" data-rm-shortcode-id="f4790eb8f0515e036b24c4195299df28"> <div id="botr_GLGsRX7e_FvQKszTI_div" class="jwplayer-media" data-jwplayer-video-src="https://content.jwplatform.com/players/GLGsRX7e-FvQKszTI.js"> <img src="https://cdn.jwplayer.com/thumbs/GLGsRX7e-1920.jpg" class="jwplayer-media-preview" /> </div> <script src="https://content.jwplatform.com/players/GLGsRX7e-FvQKszTI.js"></script> </div>
Water Vapor Above Europa’s Surface Deteced for First Time<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="9c4abc8473e1b89170cc8941beeb1f2d"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/WQ-E1lnSOzc?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
A study finds people are more influenced by what the other party says than their own. What gives?
- A new study has found evidence suggesting that conservative climate skepticism is driven by reactions to liberal support for science.
- This was determined both by comparing polling data to records of cues given by leaders, and through a survey.
- The findings could lead to new methods of influencing public opinion.
Mind the cues<div class="rm-shortcode" data-media_id="CabkeAzx" data-player_id="FvQKszTI" data-rm-shortcode-id="169377c88f392a86f6c42180b74820a5"> <div id="botr_CabkeAzx_FvQKszTI_div" class="jwplayer-media" data-jwplayer-video-src="https://content.jwplatform.com/players/CabkeAzx-FvQKszTI.js"> <img src="https://cdn.jwplayer.com/thumbs/CabkeAzx-1920.jpg" class="jwplayer-media-preview" /> </div> <script src="https://content.jwplatform.com/players/CabkeAzx-FvQKszTI.js"></script> </div> <p>The gulf in accepting the science behind climate change also exists among party elites. It is well known to any American who is attentive to the news, as party leaders are often more than willing to discuss their take to journalists.</p><p>Using polling data going back to the 1980s, the researchers were able to create a chart showing the aggregate amount of climate skepticism among the general population. A similar diagram showing the Republicans' skepticism dating back to 2001 was sourced from a previous, similar study. It was shown to be highly correlated with the one produced for this study.</p><p>These charts were compared with media content from prominent newspapers that included implicit or explicit stances on climate change by significant political figures. These thousands of articles were classified by using key terms and which major political figures were quoted or referenced. The researchers compared the number of cues over time to measured skepticism and looked for "<a href="https://en.wikipedia.org/wiki/Granger_causality" target="_blank">Granger causality</a>," the tendency for one variable to predict the future value of another variable.</p><p>The model shows evidence of both in and out-group cue effects, though the repulsion to out-group cues was much more evident. A significant increase in Democratic cues in favor of climate science was followed by a rise in skepticism among Republican voters. Importantly, the cues lead, rather than follow opinion, and do so with consistency. Changes in view did not predict changes in the number or direction of cues. </p><p>The researchers also surveyed nearly 3000 adults to demonstrate the concept. This involved showing them a statement on the scientific consensus around climate change and a cue from either a Republican or a Democrat. This test confirmed the previous observation and provided further support for the notion that signals from leaders cause an increase in skepticism among some respondents.</p><p>Before my left-leaning and Democratic readers get too smug, this research references previous studies demonstrating a similar effect in the lead up to the Iraq War. However, in that case, the Democratic Party elites' mixed messages were countered by a Republican Party united behind the idea of invasion. The effect on the Democratic party rank and file was similar to that observed in this case. </p><p>Several other studies have examined effects similar to this for other issues. This study's importance is its focus on out-group cues and the effort placed into demonstrating a causal relationship between the statements of certain party elites and public opinion. Most previous studies focused purely on in-group cues or failed to differentiate between the two. </p>
Can thinking about the past really help us create a better present and future?
- There are two types of counterfactual thinking: upward and downward.
- Both upward and downward counterfactual thinking can be positive impacts on your current outlook - however, upward counterfactual thinking has been linked with depression.
- While counterfactual thinking is a very normal and natural process, experts suggest the best course is to focus on the present and future and allow counterfactual thinking to act as a motivator when possible.
“Upward” versus “downward” counterfactual thinking<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzQ1NDYxOS9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY0NDM2MDY2OX0.njWs1qrV1vDBxU1V75tUduUW4TjJvEHglDWsK8ZF2l4/img.jpg?width=1245&coordinates=0%2C556%2C0%2C209&height=700" id="a15fa" class="rm-shortcode" data-rm-shortcode-id="98314d4d2b256ed08f42d369fe4ae080" data-rm-shortcode-name="rebelmouse-image" alt="concept of man thinking about the past one line drawing counterfactual thinking" />
What are upward and downward counterfactual thinking?
Image by one line man on Shutterstock<p><strong>What is upward counterfactual thinking?</strong></p><p>Upward counterfactual thinking happens when we look at a scenario and ask ourselves "what if" in terms of how our life could have turned out better. </p><p>Examples of upward counterfactual thinking are: </p><ul><li><em>"I wish I had taken that other job instead of this one 10 years ago - my life would be so much better if I had." </em></li><li><em>"I wish I would have gotten the part in that high school play, maybe I could have gotten into a theatre school and became an actor…"</em> </li></ul><p>Both of these examples have the ideology that if you had made different choices, your life right now would be improved. </p><p><strong>What is downward counterfactual thinking?</strong></p><p>Downward counterfactual thinking is, naturally, the opposite of upward counterfactual thinking in that we think about how things could have been worse if other decisions had been made. </p><p>Examples of downward counterfactual thinking are: </p><ul><li><em>"I'm so thankful I studied secondary education in university instead of psychology like I had originally planned - I love teaching high school kids and I never would have gotten to do that…" </em></li><li><em>"I'm so happy I left David when I got the chance, I can't imagine still being in an unhappy marriage with someone who doesn't support me…"</em> </li></ul><p>In these examples, we see the idea that if you had made different choices your life would not be as good as it is right now. </p>
How counterfactual thinking can impact your life<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzQ1NDYxNy9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTYyNjI2MDQxOX0.DIVQ-Yk0d6yE3tc743MH1Fz2pOg1TGHLmhp8dPp9UdY/img.jpg?width=1245&coordinates=0%2C0%2C0%2C0&height=700" id="522d7" class="rm-shortcode" data-rm-shortcode-id="da7df6ad916b043e3610223900d0f8df" data-rm-shortcode-name="rebelmouse-image" alt="man thinking what if written on chalkboard" />
How do upward and downward counterfactual thinking impact your life?
Photo by Brasil Creativo on Shutterstock<p>While many people don't see the point in "what if" scenarios, various studies have found that downward counterfactual thinking can be more associated with psychological health compared with upward counterfactual thinking. Not only that, but research has also shown upward counterfactual thinking can be linked with current and future depression.</p> <p><strong>Downward counterfactual thinking tends to be more associated with psychological health </strong></p><p>According to a <a href="http://journal.sjdm.org/jdm06136.pdf" target="_blank">2000 study</a>, downward counterfactual thinking can be linked with better psychological health compared to upward counterfactual thinking. More importantly, in cases where downward counterfactual thinking did lead to negative feelings, those feelings acted as something of a motivator for people to take productive actions to better their current situation. </p> <p><strong>Upward counterfactual thinking tends to be more associated with depression </strong></p><p><a href="https://www.sciencedirect.com/science/article/abs/pii/S0272735816301714#:~:text=An%20upward%20counterfactual%20(as%20opposed,Markman%20and%20McMullen%2C%202003)." target="_blank">According to a 2017 study</a> that pooled a sample of over 13,000 respondents, thoughts about "better outcomes" and regret (upward counterfactual thinking) were associated with current and future depression. </p> <p><strong>Downward counterfactual thinking can actually improve your relationships and is more often engaged in by women than men.</strong></p><p>In a <a href="https://dspace.sunyconnect.suny.edu/bitstream/handle/1951/67589/Studer_Thesis.pdf?sequence=1&isAllowed=y" target="_blank">2016 research paper submitted</a> to the Department of Psychology at the State University of New York at New Paltz, downward counterfactual thinking in regards to romantic relationships was associated with relatively positive relationship outcomes. Interestingly, women were more likely than men to engage in downward counterfactual thinking about their romantic life. </p> <p><strong>Upward counterfactual thinking can have some benefits in certain scenarios. </strong></p><p>When we look back after a failed test and think "I wish I would have studied more" - this motivates us to study harder the next time a test comes up. In this way, upward counterfactual thinking (or the negative version of "what if") can actually benefit us. </p> <p><strong>This can be difficult, though, because much of the time upward counterfactual thinking is more associated with a pessimistic outlook that can be unmotivating. </strong></p> <p>Thinking in the past tense can be motivational (and even healthy) at times, but the best thing to do is look forward. </p><p>While counterfactual thinking as a whole can be used to motivate us to make better choices or appreciate where we are in life, <a href="https://www.psychologytoday.com/us/blog/darwins-subterranean-world/201809/the-psychology-what-if" target="_blank">this Psychology Today</a> article suggests that we should come up with ways to move on and focus on the present and the future instead of the past. Using counterfactual thinking as a motivational tool can be very helpful if we don't get stuck in the "what if" mindset that tends to pull us out of the present and back into the past, where things will always remain the same. </p>