内容摘要：Guardsmen Perry Wray Woodland of Great Falls and Deni Lynn Draper of Clancy could not be reached.

Guardsmen Perry Wray Woodland of Great Falls and Deni Lynn Draper of Clancy could not be reached.

emerged from the ocean around 400 million years ago, they evolved the ability to live exclusively on land much faster than previously assumed.“We had thought the transition from fin to limb took much longer,” said California State University paleontologist Stuart Sumida, who was not involved in the new research.

Previously the earliest known reptile footprints, found in Canada, were dated to 318 million years ago.AP correspondent Donna Warder reports on some really old fossil footprints.The ancient footprints from Australia were found on a slab of sandstone recovered near Melbourne and show reptile-like feet with long toes and hooked claws.

This image provided by Prof. Per Erik Ahlberg shows a slab of sandstone found near Melbourne, Australia preserving fossil footprints from a reptile-like animal that lived around 350 million years ago. The footprints are highlighted in yellow (front feet) and blue (back feet) and show the movements of three similar animals, researchers say. (Grzegorz Niedzwiedzki/Prof. Per Erik Ahlberg via AP)This image provided by Prof. Per Erik Ahlberg shows a slab of sandstone found near Melbourne, Australia preserving fossil footprints from a reptile-like animal that lived around 350 million years ago. The footprints are highlighted in yellow (front feet) and blue (back feet) and show the movements of three similar animals, researchers say. (Grzegorz Niedzwiedzki/Prof. Per Erik Ahlberg via AP)

Scientists estimate the animal was about 2 1/2 feet (80 centimeters) long and may have resembled a modern monitor lizard. The findings were

The hooked claws are a crucial identification clue, said study co-author and paleontologist Per Ahlberg at Uppsala University in Sweden.Harvard’s lawsuit said the administration violated the government’s own regulations for withdrawing a school’s certification.

The government can and does remove colleges from the Student Exchange and Visitor Program, making them ineligible to host foreign students on their campus. However, it’s usually for administrative reasons, such as failing to maintain accreditation, lacking proper facilities for classes, or failing to employ qualified professional personnel.

Noem said Harvard can regain its ability to host foreign students if it produces a trove of records on foreign students within 72 hours. Her updated request demands all records, including audio or video footage, of foreign students participating in protests or dangerous activity on campus.The lawsuit is separate from the university’s earlier one challenging more than $2 billion in federal cuts imposed by the Republican administration.