Abundant fossil bones, teeth, trackways, and other hard evidence ... And in 2019, paleontologists digging in North Dakota found a treasure trove of fossils extremely close to the K-Pg boundary ...

MATERIAL AND METHODS: A total of 30 implants (Dentium Co, Seoul, Korea) were placed in 5 dog mandibles. Bone quality was assessed at each site. Implant stability was evaluated using 2 different ...