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gertrude Nach einem Vulkanausbruch starben viele Pferde, sodass Karl Drais die Laufmaschine als pferdelosen Ersatz erfand.
gertrude 1817 legte Karl Drais mit seiner hölzernen Laufmaschine ohne Pedale vierzehn Kilometer in einer Stunde zurück.
gertrude Die Erfindung des Fahrrads
Zwei Räder rollen, zwei Räder rollen / Wir laufen ganz ohne Pedale durch Mannheim!
gertrude Wegen rücksichtsloser Fahrer auf Gehwegen verboten viele Städte die Laufmaschine schon kurz nach ihrer Erfindung.
Verbotene Laufmaschinen: Bereits 1819 drohte Fahrern in Mailand ein Bußgeld, wenn sie mit einer Laufmaschine auf Gehwegen erwischt wurden.
gertrude Karl von Drais erfand 1817 eine lenkbare Laufmaschine aus Holz, die als Urvater des modernen Fahrrads gilt.
Ein zweirädriges Fahrzeug ohne Pedale, das durch das Abstoßen der Füße vom Boden fortbewegt wird. Karl Drais stellte dieses hölzerne Urfahrrad im Jahr 1817 bei seiner ersten Fahrt in Mannheim vor.
Welcher Berufsgruppe gehörte der Erfinder Karl Drais an, bevor er sich ganz seinen Erfindungen widmete?
Würdest du heute mit einer pedal-losen Laufmaschine zur Schule oder Arbeit rollen?
Welches Naturereignis im Jahr 1815 spornte Karl Drais zur Erfindung der Laufmaschine an?
Wie lenkte man die allererste Laufmaschine von Karl Drais?
Welchen Spitznamen erhielt die verbesserte Laufmaschine von Denis Johnson im London des Jahres 1818?
Warum verbot die Stadt Mannheim bereits 1817 das Fahren mit der Laufmaschine auf Gehwegen?
Aus welchem Hauptmaterial bestand die erste Laufmaschine von Karl Drais im Jahr 1817?
Wie bremste man eine Laufmaschine im frühen 19. Jahrhundert ab?
Wie schnell war Karl Drais bei seiner ersten dokumentierten Fahrt im Juni 1817 unterwegs?
gertrude Everglades National Park
Gators and crocs, gators and crocs Chilling side-by-side where the fresh meets the salt
gertrude Florida's climate marks the geographic boundaries for both reptile species.
Everglades scale: The Everglades is actually a giant, slow-moving river that is 60 miles wide and over 100 miles long, moving just a few feet per day.
gertrude A vast, slow-moving river of grass forms the backdrop of this reptile intersection.
A coastal body of water where freshwater from rivers mixes with saltwater from the ocean. This brackish zone in Florida's subtropical wetlands is the only wild habitat where alligators and crocodiles coexist.
Why does water in the Everglades move so slowly southward?
Which reptile would you rather see safely from a tour boat?
What is the primary reason American crocodiles cannot live in northern U.S. states?
Which specific ecosystem in the Everglades serves as the main meeting ground for both reptiles?
Approximately how many acres of land does the Everglades National Park cover?
In what year did author Marjory Stoneman Douglas publish her famous book calling the Everglades the 'River of Grass'?
Which river's freshwater flow serves as the primary northern water source for the Florida Everglades?
What type of water is formed when freshwater from rivers mixes with saltwater from the ocean?
Which unique U.S. wetland is the only place on Earth where alligators and crocodiles naturally coexist?
gertrude The Trinity River
A year and four days / to steam to Dallas / through the snags and mud
gertrude A historic flood in 1908 forced Dallas to completely redesign its landscape and move the unruly Trinity River.
Trinity River navigation: In 1868, a steamboat called Job Boat took five months to reach Dallas, only to sink on its return journey.
gertrude An 1893 steamboat expedition took over a year to travel from Galveston to Dallas, proving the river was unnavigable.
A major river in Texas that flows into the Gulf of Mexico. Following a catastrophic 1908 flood, Dallas channelized this winding waterway behind massive concrete levees.
Who founded the trading post on the Trinity River that eventually became Dallas in 1841?
Would you live in a city prone to major natural flooding?
Unlike Houston or Chicago, what key natural feature did early Dallas completely lack?
What major engineering project did Dallas undertake to protect the city after the 1908 flood?
What was the main commercial crop early Dallas settlers hoped to ship down the Trinity River?
How long did the Snagboat Harvey take to travel from Galveston to Dallas in 1893?
What was the record height of the Trinity River during the devastating Dallas flood of May 1908?
Which body of water did early Dallas settlers hope to reach via the Trinity River?
Which steamboat famously sank on its return journey after taking five months to reach Dallas in 1868?
