Scientists to remove ancient bones from prehistoric animal trap

摘要

For the first time in more than 30 years, paleontologists are set to revisit a Wyoming cave that has proved to be a treasure trove of prehistoric fossils dating back possibly 100,000 years. The Bureau of Land Management is preparing to pull back a metal grate over the naturally hidden opening of Natural Trap Cave in north-central Wyoming. The grate was installed in the 1970s to out keep people and animals.