(April 24, 2024)
The age of the Earth’s magnetic field remains under question in part because we don’t fully understand what causes it today. We know it is a product of movements in the molten outer core, whose high iron content turns convection currents into a dynamo, and these currents in turn are produced by the solidification of the inner core.
(April 2018)
Using constraints from experiments, simulations, and theory, we show that spontaneous crystallization in a homogeneous liquid iron alloy at Earth‘s core pressures requires a critical supercooling of order 1000 K, which is too large to be a plausible mechanism for the origin of Earth‘s inner core. We consider mechanisms that can lower the nucleation barrier substantially. Each has caveats, yet the inner core exists: this is the nucleation paradox.
(February 9, 2018)
„Everyone, ourselves included, seemed to be missing this big problem,“ study author Steven Hauck, a professor of Earth, Environmental and Planetary Sciences at Case Western Reserve University in Ohio, said in a statement. Namely, they were missing „that metals don‘t start crystallizing instantly unless something is there that lowers the energy barrier a lot.“
In chemistry, this extra energy is known as the nucleation barrier: the point at which a compound visibly changes its thermodynamic phase.
(…)
In their paper, the researchers proposed one possibility: Perhaps a massive nugget of solid metal alloy dropped from the mantle and plunged into the liquid core.
„Für uns alle ist das eine wirkliche Enttäuschung. Das muss man sagen. Daran will ich nicht vorbeireden“, sagt Wadephul später im Interview mit den ARD-Tagesthemen. In der deutschen Delegation herrscht Katerstimmung. Bis zuletzt war man zuversichtlich, dass die vielen Last-Minute-Gespräche, die Wadephul seit Freitag in New York geführt hatte, ausreichen würden. Die Liste der vermeintlichen Unterstützer-Staaten schien lang genug zu sein.
The United Nations General Assembly on Wednesday elected Austria, Kyrgyzstan, Portugal, Trinidad and Tobago and Zimbabwe to the 15-member U.N. Security Council for two-year terms starting on January 1, 2027.
Germany, which had lobbied hard for a seat, came third for the two places contested by the Western European and Others Group, with 104 votes, against 134 for Portugal and 131 for Austria.
(video)
US President Donald Trump on Saturday urged other nations, including China, to deploy ships to help secure the Strait of Hormuz, a key route for global oil supplies disrupted by the war in the Middle East.
Die Antragsgegnerin stützt ihre Bewertung ausschließlich auf öffentlich verfügbare Quellen und hat nachrichtendienstliche Informationen zu weitergehenden, nicht öffentlich verlautbarten Zielen der Antragstellerin auch im gerichtlichen Verfahren nicht mitgeteilt.
British MP Jeremy Corbyn (left) meets Hadash MK Ofer Cassif, Nov. 12, 2025 (Photo: Al Ittihad)
(February 6, 2025)
(June 28, 2024)
Jon Stewart goes live after CNN‘s presidential debate to unpack Biden‘s senior moments and Trump‘s blatant lies. #DailyShow #JonStewart #Debate
(February 13, 2024)
Eine „historische“ Nationalratswahl sei das gewesen, das liest und hört man oft. Für die heute geschlagene Wahl stimmt es tatsächlich. Die Nationalratswahl 2024 ist voller historischer Superlative – im positiven wie negativen Sinne. Sie markiert die Zeitenwende in die Dritte Republik. Wie diese ausschauen wird, werden uns die nächsten Wochen der Sondierungen und Koalitionsverhandlungen zeigen.
As you’ve probably heard by now, a very scary poll released on Sunday shows Joe Biden losing the 2024 election to the four-time indicted insurrection enthusiast Donald Trump in five out of six major battleground states. That’s obviously a wildly disturbing prospect; it would be like asking someone if they’d like to catch a movie after work or have a rusty crowbar shoved up their ass, and then seeing them choosing the latter. But possibly even more surprising? How popular anti-vaxxer candidate Robert F. Kennedy Jr. is among voters.
(Fri May 19, 2023)
Administration officials are not aware, however, of any formal requests by any allies to export F-16s, and State Department officials who would normally be tasked with the paperwork to approve such third-party transfers have not been told to get to work, officials said.
(May 17, 2023)
Some say you’ve unleashed this revolution to evade your trial. That makes no sense. You could drag it on for years or subvert it with less drastic legislative initiatives.
Others posit that you are intimidated by the extremists — those you have empowered politically, and the toxic commentators on TV, radio and social media, including some very close to home.
I hear that some people who know you well think you have convinced yourself that you are truly King Bibi, a great, historic national figure, wiser and more capable than all.
„Von Verschwörungstheorien und Desinformationen – zum Beispiel aus Russland – können große Gefahren ausgehen“, sagte der Kommandeur des Zentrums Innere Führung in Koblenz, Markus Kurczyk, der Nachrichtenagentur dpa. Man müsse „in diese Themen rein, wir müssen hier die Soldatinnen und Soldaten sensibilisieren“, so der 58 Jahre alte Generalmajor. „Wir erleben auch bei ihnen das Risiko, in falschen Informationsblasen des Internets gefangen zu sein.“
(30.01.2022)