from the world's big
Ancient deer-like creatures returned to the ocean to become whales. But why?
Researchers are starting to get a handle on why ancient creatures returned to the ocean after their ancient ancestors climbed out of it.
The ocean may be the origin of all life on Earth, but that isn’t to say that all the animals who evolved on land left the water behind forever. In fact, we’re starting to get a pretty good picture of why certain species that returned back to the water decided to do so and how they developed into the marine animals we know today. Paleontologists say creatures began exploring the land during the Silurian period (440-410 million years ago). No one is sure why this occurred. Some scientists say it may have been tight competition for resources in marine environments that pushed species to look for food elsewhere.
The first land explorers were arthropods, who started spending just a little bit of time on the surface and then began doing so more and more. They were pre-adapted to land exploration because of their hard shells, which helped retain water. Around 370 million years ago, certain species became permanent land residents. Spiders, mites, and centipedes were the first inhabitants. Then, over the next few million years, amphibians, reptiles, and finally mammals made it onto the scene. But that doesn’t mean they all stayed on land.
During the Early Triassic period (approx. 252-247 million years ago) onward, dozens of terrestrial and freshwater animals returned to the sea. Birds, reptiles, amphibians, and mammals were among them. They evolved and eventually became dominant players in their ecosystems during the Mesozoic and Cenozoic eras. Today, lots of the marine mammals we know and love started out as land-based species.
For instance, a walrus’s ancestor resembles the modern otter, while whales come from a species of ancient deer-like creatures known as Indohyus. They roamed southern Asia about 48 million years ago. An Indohyus was only about the size of a raccoon, and researchers believe that they fed on aquatic plants.
Model of an Indohyus. Note its deer-like feet. (Credit: Ghedoghedo, Wikimedia Commons.)
So what coaxed these creatures back into the ocean 100 million years after their ancestors climbed out of it? A duo of researchers contend that this question has received far too little attention, until now. The results of their study has been published in a report in the journal Paleobiology. To date, there have been two prevailing hypotheses.
In one, ecosystem collapse caused mass extinction, pushing animals back toward the sea for food. In another, competition added pressure on species while abundant food sources in the ocean, particularly in areas near the shoreline, pulled species back toward the sea. Geerat Vermeij at the University of California-Davis and his colleague Ryosuke Motani decided to test these theories to see which one was more likely.
The scientists isolated 69 incidents in which a terrestrial species decided to live in or extract sustenance from the ocean after a mass extinction had taken place. In two of the largest such events, one that occurred 201 million years ago at the end of the Triassic and another at the end of the Cretaceous period, there was no grand exodus of land animals back into the sea. A 2014 South African study discovered an increase in species returning to the ocean 66 million years ago, at the tail end of the Cretaceous extinction. What differed in this study was that the previous one only included animals which are still around today.
Vermeij and Motani’s study supports the idea that terrestrial animals took advantage of food sources in the ocean periodically, not just after mass extinctions, and the trend has only increased over the past 60 million years or so. One reason that may be a pull factor: kelp and seagrass beds developed over this period, allowing for more marine life to sprout and proliferate closer to shore.
To learn more about whale evolution, click here.
Sallie Krawcheck and Bob Kulhan will be talking money, jobs, and how the pandemic will disproportionally affect women's finances.
Do you get worried or angry? Ever forget to tithe? One minister has bad news for you.
- A recently published article claims to identify the symptoms of "low-level atheism."
- Among these symptoms are worrying, cursing, and not tithing.
- There is a solution to all of this though, not being an atheist. Sending in money is also involved.
Are you worried about literally anything? You're an atheist now!<p>The essay begins by focusing on worrying, an all too common problem and gateway emotion to atheism:</p><p style="margin-left: 20px;"><em>"Every time we take a thought break and begin to wonder about how we will pay the stove oil bill, or the light bill, or what we are going to do if we get laid off from work in six months, we are worrying. We are actually telling the Lord, 'Jesus, you know all that stuff you said in Matthew chapter six about how you will take care of us? I don't believe it. I don't believe that you can do what you promised, so I am taking matters into my own hands; I'm going to worry about it until the situation is taken care of.'"</em></p><p>As it turns out, God plans his days around your dilemmas and will get to them in due course. So, if you are bothered about not being sure where your rent is coming form this month, you're doubting the Lord. Concerned about things like climate change? You're practically an iconoclast. Anxious at the thought that you aren't a good enough Christian? According to this, that exact worry is a sign that you aren't!</p><p>Are you feeling even more worried now? Oh, that isn't a good sign at all. You ought to be worried about that. </p>
Swearing and occasionally being angry, now signs of metaphysical distress!<p>According to Lindley:</p><p style="margin-left: 20px;"><em>"I have only sworn two times since receiving the Holy Ghost. The Lord has the power to change our attitudes and habits. I wish I could say that I never get angry anymore either, but that is not the case. Just like you, I struggle with atheistic tendencies.</em></p><p style="margin-left: 20px;"><em>"Every time something doesn't go the way we want it to and we get angry, we are telling the world, 'I am losing my temper, because this problem is so messed up that not even God can sort it out.' When we slam doors, swear, yell, break dishes, speed, or shake our fist at somebody we are in the grip of an atheism attack. </em></p><p style="margin-left: 20px;"><em>"You see the Bible very clearly states that there is nothing too hard for God to fix.</em> <em>'And we know that all things work together for good to those who love God, to those who are called according to his purpose.' </em>(Romans 8:28 NKJV) <em>This is why a person who has been born again can hit their thumb with a hammer and not swear. This is why the sincere Christian can look at a flat tire and say, 'I guess God needs to slow me down, because he has someone he needs me to cross paths with today.' Swearing and getting angry only says, 'There is absolutely no way that God can turn this flat tire into a blessing!'"</em><em></em></p><p>Well, shit. It seems that being angry with things, including things that might seem to be perfectly reasonable things to be mad at, is admitting that you think God is useless.</p><p>How exactly this reconciles with Jesus getting pissed off at <a href="https://en.wikipedia.org/wiki/Cleansing_of_the_Temple" target="_blank">the moneylenders in the temple</a> and <a href="https://www.biblegateway.com/passage/?search=Mark+3&version=NIV" target="_blank">healers that refused to save lives on Sunday</a> is unclear. Neither of these incidents seem to be the things that happen to somebody without bursts of anger, though I do suppose it is possible Christ had fits of atheism multiple times in his life. </p><p>Sometimes I don't believe in myself either. </p>
Stinginess, now coming to a den of heathens near you!<p>Lindley points out the final, most advanced symptom of atheism last: Not sending God money. He writes:</p><p style="margin-left: 20px;">"<em>Some people are so greedy that they actually rob God.</em> <em>'…In what way have we robbed God? In tithes and offerings</em>.' (Malachi 3:8 NKJV)) <em>To those who would hold back the tithe the Lord has a challenge</em>: <em>'Bring all the tithes into the storehouse, that there may be food in My house, and try Me now in this' says the Lord of hosts, 'If I will not open for you the windows of heaven and pour out for you such blessing that there will not be room enough to receive it.' </em>(3:10 NKJV)"</p><p>While the God of Abraham is well known not to need money on account of his transcendental nature, it seems that he is still owed ten percent of everybody's earnings. This is not paid to him, of course, but to his helpers. In exchange for this, God will make good things happen. If you don't send money in addition to swearing or occasionally being grouchy, the minister assures us that <em>"you are at extreme risk for very serious complications from your atheism."</em></p><p>While this may look remarkably similar to a concept used by the mafia, <a href="https://en.wikipedia.org/wiki/Protection_racket" target="_blank">the protection racket</a>, it is an utterly different operation. In the case of the mob, the threat of punishment is used as a way to force people into paying part of their earnings to a larger organization. In return, they are promised the protection of that organization from vague threats, often including that organization. <br> <br> In this holy case, vague are threats used to show people the wisdom of paying part of their earnings to the church. In exchange for their payments, they are offered kickbacks from God and protection from vague threats made by the people telling them they need to send in money. </p><p>Luckily, Lindley suggests a solution for all three problems, especially the last one: Don't be an atheist! In particular, start praying and sending God money. This will resolve the third symptom automatically and the first two eventually.</p><p><a href="https://www.youtube.com/watch?v=UhnsHvz7UL8" target="_blank">It's an offer you can't refuse.</a> </p>
And now, the serious part.<div class="rm-shortcode" data-media_id="SuG8OGad" data-player_id="FvQKszTI" data-rm-shortcode-id="9e1bfda7981ed1abe9eb979157ea0496"> <div id="botr_SuG8OGad_FvQKszTI_div" class="jwplayer-media" data-jwplayer-video-src="https://content.jwplatform.com/players/SuG8OGad-FvQKszTI.js"> <img src="https://cdn.jwplayer.com/thumbs/SuG8OGad-1920.jpg" class="jwplayer-media-preview" /> </div> <script src="https://content.jwplatform.com/players/SuG8OGad-FvQKszTI.js"></script> </div> <p>While it is fun to mock the often-ludicrous positions of those who misunderstand atheism, that very misunderstanding is an all too common and all too real issue for the millions of Americans who are not religious. Atheists in the United States face <a href="https://en.wikipedia.org/wiki/Discrimination_against_atheists#United_States" target="_blank">discrimination</a>,<strong></strong> are not <a href="https://psycnet.apa.org/record/2011-25187-001" target="_blank">trusted</a>, and are barred from <a href="https://en.wikipedia.org/wiki/Discrimination_against_atheists#Atheists_eligible_to_hold_office" target="_blank">running for office </a>in several states.</p><p> In my experience, many of these tend to come from a fundamental misunderstanding of what atheism <em>is</em>. I, at various times, have been accused of being a Satanist, a pagan, or an amoralist, among other things. It is little wonder why a person who doesn't understand what atheism <em>is</em> would find a variety of issues arising from it. </p><p>The minister in this case makes a similar mistake: He begins by thinking that atheism is something other than the proposition that there are no gods and then works forward. In this case, he seems to presume it is some kind of psychological condition which manifests as a hybrid of anxiety, Tourette's syndrome, and kleptomania. His use of the word "symptoms" is revealing. </p><p>While it is true that atheism can be anxiety-inducing, this falls more under the category of "<a href="https://en.wikipedia.org/wiki/Existentialism#Angst_and_dread" target="_blank">existential dread</a>" than psychosis. John-Paul Sartre, the atheistic philosopher who made Existentialism popular, wrote on this extensively. In his essay <em>"</em><a href="http://www.mrsmoser.com/uploads/8/5/0/1/8501319/english_11_ib_-_no_exit_-_existentialism_is_a_humanism_-_sartre.pdf" target="_blank">Existentialism is a Humanism</a><em>," </em>he explains:</p><p style="margin-left: 20px;"><em>"What do we mean by saying that existence precedes essence? We mean that man first of all exists, encounters himself, surges up in the world—and defines himself afterwards. If man as the existentialist see him is not definable, it is because to begin with he is nothing. He will not be anything until later, and then he will be what he makes of himself. Thus, there is no human nature, because there is no God to have a conception of himself … what do we mean by anguish? The existentialist frankly states that man is in anguish. His meaning is as follows: When a man commits himself to anything, fully realizing that he is not only choosing what he will be, but is thereby at the same time a legislator deciding for the whole of mankind—in such a moment a man cannot escape from the sense of complete and profound responsibility."</em><em></em></p><p>If choosing what you are and what meaning your life will have doesn't give you anxiety, Sartre would suggest you're doing something wrong. </p><p>However, this anxiety isn't necessarily cured by belief. <a href="https://plato.stanford.edu/entries/kierkegaard/" target="_blank">Soren Kierkegaard</a>, the founder of Existentialism, wrote extensively on the topics of angst, dread, anxiety, and regretting all of your life choices while being a thoroughly devoted Christian. While he argues that the leap of faith can help, he also argues that we are still fundamentally alone and responsible for our choices when it comes to making that anxiety-inducing <a href="https://en.wikipedia.org/wiki/The_Concept_of_Anxiety" target="_blank">leap</a>.</p><p>The minister's point about swearing as a result of lacking faith is bizarre enough to be left alone. Ten minutes in any bar in the middle section of the country on a Friday night should be enough to convince anybody that any sincere believer can swear while remaining a believer. </p><p>Furthermore, the minister presumes that a believer is going to be of the kind that thinks God is very engaged in human life. While he may suppose God was involved in his tire going flat, many other approaches to the divine reject that idea. Deists, who tend to think that there is a God who created the cosmos but leaves it <a href="https://en.wikipedia.org/wiki/Deism#Aspects_of_contemporary_deism" target="_blank">alone</a>, would be an example. </p><p>All in all, the essay described above is an unintentionally hilarious look at what some people think being an atheist is like. It is hardly the <a href="https://www.scientificamerican.com/article/can-atheist-be-in-awe-of-universe/" target="_blank">first</a>, and it won't be the last. Anxiety about atheism has a history going back to <a href="https://en.wikipedia.org/wiki/Apology_(Plato)#Accusers_of_Socrates" target="_blank">ancient Greece</a>—studies demonstrate the continued <a href="https://bigthink.com/ideafeed/atheists-threaten-believers-with-mortality" target="_blank">existence</a> of Christian anxiety about atheists—and this essay is another example of people being unduly concerned about it. </p><p>I'd accuse the minister of worrying too much about atheism, but then he'd be <a href="https://www.youtube.com/watch?v=39Bnk6VU53Y" target="_blank">one of us</a>. </p>
The coronavirus pandemic has brought out the perception of selfishness among many.
- Selfish behavior has been analyzed by philosophers and psychologists for centuries.
- New research shows people may be wired for altruistic behavior and get more benefits from it.
- Crisis times tend to increase self-centered acts.
Paul Krugman on the Virtues of Selfishness<div class="rm-shortcode" data-media_id="7ZtAkm6C" data-player_id="FvQKszTI" data-rm-shortcode-id="828936bf6953080e9018307354c0c02b"> <div id="botr_7ZtAkm6C_FvQKszTI_div" class="jwplayer-media" data-jwplayer-video-src="https://content.jwplatform.com/players/7ZtAkm6C-FvQKszTI.js"> <img src="https://cdn.jwplayer.com/thumbs/7ZtAkm6C-1920.jpg" class="jwplayer-media-preview" /> </div> <script src="https://content.jwplatform.com/players/7ZtAkm6C-FvQKszTI.js"></script> </div> The Nobel Prize-winning economist on the virtues of selfishness.
Evolution Is Moving Us Away from Selfishness. But Where Is It Taking ...<div class="rm-shortcode" data-media_id="cyeqmYCb" data-player_id="FvQKszTI" data-rm-shortcode-id="6c5efecb56456e9acc25cf36935b1826"> <div id="botr_cyeqmYCb_FvQKszTI_div" class="jwplayer-media" data-jwplayer-video-src="https://content.jwplatform.com/players/cyeqmYCb-FvQKszTI.js"> <img src="https://cdn.jwplayer.com/thumbs/cyeqmYCb-1920.jpg" class="jwplayer-media-preview" /> </div> <script src="https://content.jwplatform.com/players/cyeqmYCb-FvQKszTI.js"></script> </div>
Exploring Morality and Selfishness in Modern Times<div class="rm-shortcode" data-media_id="02eX1Cag" data-player_id="FvQKszTI" data-rm-shortcode-id="45cc6180db791f32683988fb52faff26"> <div id="botr_02eX1Cag_FvQKszTI_div" class="jwplayer-media" data-jwplayer-video-src="https://content.jwplatform.com/players/02eX1Cag-FvQKszTI.js"> <img src="https://cdn.jwplayer.com/thumbs/02eX1Cag-1920.jpg" class="jwplayer-media-preview" /> </div> <script src="https://content.jwplatform.com/players/02eX1Cag-FvQKszTI.js"></script> </div> Philosopher Peter Singer discusses the state of global ethics.
Parenting could be a distraction from what mattered most to him: his writing.
Ernest Hemingway was affectionately called “Papa," but what kind of dad was he?