Alaska may have been the Dinosaur Highway.

an international team of researchers reported that they found a unique combination of fossils of two types of dinosaur footprints in Alaska, suggesting that Alaska 70 million years ago may have been a "highway" between Asia and North America.
the Pero Museum of Nature and Science in Texas said in a statement that the agency's researchers and colleagues in Alaska's Dinali National Park found fossils of duck-beaked dragons and sickle dragon footprints coexisting. This is the first time that two species of dinosaurs have been found in North America.
duck-mouthed dragons and sickle dragons were large herbivorous dinosaurs that lived in late Cretaceous Asia and North America. Writing in the British journal
, the team said the new findings, which have previously seen the two dinosaurs coexist in Asia, mean that the natural environment in southern Alaska in the late Cretaceous period may have been similar to that in central Asia, with humid climates and many shallow ponds, rivers and lakes.
today's Bering Strait separates Asia from North America, but historically there have been surfaced land bridges in the region. The new findings provide new evidence for the theory that the Bering Land Bridge was a channel for animals from two continents to communicate, once known as the "Dinosaur Highway" between 70 and 65 million years ago.
researchers say it's not yet known whether the two dinosaurs in this group of footprints lived together or lived together, walking back and forth through the same area. From the dental characteristics, the platypus is biased towards eating grass near the ground, the sickle dragon is biased towards eating high leaves, there is no conflict between the two in terms of food resources, living together may also be conducive to joint resistance to predators, but whether this is the case requires further evidence. (Source: Xinhua News Agency)