between 450 and 420 B.C.E., offered a far more jarring experience. Archaeological evidence, including calcined animal bones found in the entranceway, points to the performance of intense cult rituals, possibly involving blood sacrifice, that prepared...

providing a unique look at the reproductive biology of these mysterious creatures. An Unprecedented Association of Bones and Eggs Finding fossilized eggs in direct proximity to adult skeletal remains is an extreme rarity in the field of vertebrate...

on an archaeological site known as Jebel Katefeh-1 (JKF-1), located near the city of Jubbah. While the lack of recovered bones or DNA means the conclusion remains speculative, the shape and construction of the tools provide a compelling case for a...

Knaust drew a parallel to the behavior of modern birds of prey. Just as owls produce pellets composed of indigestible bones and fur after swallowing prey whole, these ancient marine reptiles appear to have regurgitated the hard, undigested remains of...

areas in northwest Europe to be colonized by humans, with the current record largely consisting of fragmented, cut-marked bones rather than the elaborate artistic expressions found elsewhere on the continent. The discovery of potential cave art—a rarity...

15 tiles offers an intimate look at the crew’s daily routine. The presence of bronze cooking pots, ceramic bowls, and fish bones indicates that sailors were moving away from a diet of cold, preserved rations toward hot, freshly prepared meals. Personal...

and faces of the deceased.” A view of the tomb entrance. Credit: BBC Evidence of reburial—such as disarticulated or missing bones—suggests that the Chimú practiced complex ancestor veneration, where the remains of the deceased were kept and handled by...

within two fragile, crushed slabs of stone. Because physically removing the fossil from its matrix would have destroyed the bones, paleontologists were forced to rely on superficial observations, specifically its four limbs and claw-tipped digits. To...

reaches of the site, where additional sections of the vessel likely lie undisturbed. For now, the small collection of animal bones recovered from the deck—remnants of the pork and mutton that once sustained the crew—serves as a poignant reminder of the...

diverse species, including fish, turtles, crocodiles, and large herbivorous dinosaurs. “Incorporated in the minerals of bones and teeth,” these chemical markers act as a biological record of a shared food source flowing from the ocean onto land. A...

“Once your eyes refocus, you start to see all these little fish emerge, their tiny little vertebrae and their other little bones. They are exquisitely preserved.” Why the Green River Fossils Are Unique The exceptional condition of these fossils is...

one specimen—designated DNH 127—is particularly noteworthy. Comprising parts of the temporal, parietal, and occipital bones, the fragment provides vital evidence for the presence of adult Homo erectus in southern Africa roughly 2 million years ago. Map...

the spine to see how muscles on the concave and convex sides of the curve responded. To understand what happens inside the bones and discs, the team constructed a detailed computer model of a scoliotic spine. By applying the motion data as boundary...

across the central chamber and adjacent rooms. Some of these skeletons exhibited signs of secondary burial or missing bones, suggesting that the Chimú practiced complex ancestral rites where the remains of the deceased were curated and handled long...

foot providing a sense of scale. Credit: Thailand Department of Mineral Resources Decoding Ancient Movement While fossilized bones offer a snapshot of a creature’s anatomy, trackways provide rare evidence of behavior, locomotion, and gait. By analyzing...

Learn about platelets, their role in blood clotting, and methods to estimate platelet count, including manual techniques. Understand normal, high, and low platelet counts. Platelets, also referred to as thrombocytes, are essential components of the...

A blood film or peripheral blood smear is a thin layer of blood smeared on a microscope slide and then stained in such a way to allow the various blood cells to be examined microscopically. A blood film or peripheral blood smear is a thin layer of...

Life history of malaria parasite consists of two cycles of development: asexual cycle or schizogony that occurs in humans and sexual cycle or sporogony that occurs in mosquitoes. Life history of malaria parasite consists of two cycles of development:...

Porphyrias (from Greek porphura meaning purple pigment; the name is probably derived from purple discoloration of some body fluids during the attack) are a heterogeneous group of rare disorders resulting from disturbance in the heme biosynthetic...

Routine urinalysis is a cost-effective, non-invasive test used as an indicator of health or disease for metabolic and renal disorders, infection, drug abuse, pregnancy, and nutrition. Routine urinalysis is a cost-effective, non-invasive test used as an...