What’s the largest number you know?

April 25th, 2016

Tim Urban posted some interesting articles on Wait but why that illustrate large numbers:

From 1 to 1 000 000 is the tame beginning, with visualizations of numbers up to a million.

From 1 000 000 to Graham’s Number continues the journey up to Graham’s Number, compared to which a Googol and even a Googolplex is just an epsilon.

In 7.3 Billion People, One Building, he explains how long a chain of all living humans would be, and how big a building would have to be to fit them all in.

These were posted in November 2014 and March 2015, but except for the number of humans on earth (which has been estimated at 7.4 billion in March of 2016) should still be current.

Obama and Merkel

April 24th, 2016

Update: I accidentally linked to the first article twice, instead of to the third one I meant to link. Swapped the third link and article for the right one.

Democracy: US President Barack Obama calls Germany’s Angela Merkel a ‘trusted partner’. “The US president praised Chancellor Angela Merkel as a “trusted partner” and described her handling of the refugee crisis as “courageous.” Obama is in Germany’s Hanover to talk free trade and security.”

Democracy: Barack Obama goes to Hanover: How they made it happen. “The world’s largest industrial technology trade fair is hosting the United States as its partner country. And President Barack Obama has even made a personal appearance in Hanover. So how did organizers make that happen?”

Bilateral Relations: Barack Obama showers praise on Germany and its leader. “In an interview given to the daily “Bild” a day before he visits Germany, US President Barack Obama has praised German Chancellor Angela Merkel in high tones. Obama called her actions in the refugee crisis ‘courageous.'”

Die drei Artikel gibt es auch auf Deutsch:

Deutschland / USA: Auf der richtigen Seite der Geschichte”. “Die Hannover Messe eröffnen, mit der Bundeskanzlerin über politische Krisen reden, TTIP pushen: US-Präsident Obama hatte einen straffen ersten Besuchstag. Über den berichtet Sabine Kinkartz aus Hannover.”

Hannover Messe: Obama in Hannover: Wie es dazu kam. “Zum ersten Mal in der Geschichte der größten Industriemesse der Welt sind die USA das Partnerland. Und Präsident Obama lässt es sich nicht nehmen, eigens dafür nach Hannover zu reisen. Wie hat die Messe das geschafft?”

USA / Deutschland: Obama: “Stolz auf Freundin Angela”. “Vor seinem Treffen mit Angela Merkel an diesem Wochenende hat US-Präsident Obama die Kanzlerin als führungsstarke Persönlichkeit gewürdigt. In einem Zeitungsinterview lobt er vor allem ihre Flüchtlingspolitik.”

Was blüht da am Wegesrand?

April 22nd, 2016

Das frage ich mich immer, wenn im Frühjahr die Wildblumen anfangen zu wachsen.

Pflanzenbestimmung.info: “Diese Seiten sollen Ihnen dabei helfen, Pflanzen und Blumen anhand von Bildern einfach und schnell zu bestimmen. Am besten gelingt das über Blütenfarbe und -form. In der rechten Spalte finden Sie auch nicht blühenden Pflanzen, sortiert nach Wuchsform oder Lebensbereich.”

A Good Night’s Sleep

April 21st, 2016

NPR: Half Your Brain Stands Guard When Sleeping In A New Place.

“When you sleep in unfamiliar surroundings, only half your brain is getting a good night’s rest.
[…]
The finding, reported Thursday in the journal Current Biology, helps explain why people tend to feel tired after sleeping in a new place. And it suggests people have something in common with birds and sea mammals, which frequently put half their brain to sleep while the other half remains on guard.”

Zero ≠ nothing

April 20th, 2016

What is Zero? Getting Something from Nothing – with Hannah Fry “Is zero really a number? How did it come about? Hannah Fry tells the story of how zero went from nothing to something.”

Link via Schockwellenreiter.