Gun safety skills disappear when kids find the real thing – "Children are very curious—especially about things that they have been warned not to handle."

Source: Cheryl Holly, Sallie Porter, Mary Kamienski, Aubrianne Lim. School-Based and Community-Based Gun Safety Educational Strategies for Injury Prevention. Health Promotion Practice, 2018.

Bread unearthed by archaeologists is 4,000 years older than agriculture – Archaeologists have recovered the remains of a piece of flatbread baked by hunter-gatherers 14,400 years ago -- 4,000 years before the advent of agriculture.

Source: Amaia Arranz-Otaegui, Lara Gonzalez Carretero, Monica N. Ramsey, Dorian Q. Fuller, Tobias Richter. Archaeobotanical evidence reveals the origins of bread 14,400 years ago in northeastern Jordan. Proceedings of the National Academy of Sciences, 2018.

After 5,300 years, the last meal of an ancient Iceman has been revealed — and it was a high-fat, meaty feast – Otzi, the 5,300 year old iceman ate a high-fat, meat-lover's diet. But he wasn't 'Paleo,' and he also ate some toxic ferns and wheat. Scientists are analyzing his stomach contents using DNA analyses, and they're finding out that he wasn't in perfect health.

Source: Frank Maixner, et al. The Iceman’s Last Meal Consisted of Fat, Wild Meat, and Cereals. Current Biology, 2018.

World's Oldest Colors Shed Light On Ancient Life – The oldest biological colors ever found could help explain why complex, multicellular life took so long to evolve on Earth.

Source: N. Gueneli, et al. 1.1-billion-year-old porphyrins establish a marine ecosystem dominated by bacterial primary producers. Proceedings of the National Academy of Sciences, 2018.

Hominins Likely Left Africa Earlier than Believed – Our ancestors may have been on the move out of Africa 300,000 years earlier than we originally thought.

Source: Zhaoyu Zhu, et al. Hominin occupation of the Chinese Loess Plateau since about 2.1 million years ago. Nature, 2018.

Invasive rats harm reefs by robbing coral of nutritious bird excrement – Rats have a surprising impact on the health of reefs. The invasive rodents not only disrupt online ecosystems, but harm surrounding marine ecosystems, too.

Source: Nicholas A. J. Graham, et al. Seabirds enhance coral reef productivity and functioning in the absence of invasive rats. Nature, 2018.

Trilobites: New Clues to How the Biggest Dinosaurs Got So Big – A fossil found in Argentina that is more than 200 million years old suggests the most giant of dinosaurs existed earlier than paleontologists believed.

Source: Cecilia Apaldetti, Ricardo N. Martínez, Ignacio A. Cerda, Diego Pol, Oscar Alcober. An early trend towards gigantism in Triassic sauropodomorph dinosaurs. Nature Ecology & Evolution, 2018.

Sunk cost fallacy in mice, rats and humans – New research has shown that mice, rats, and humans all commit the sunk cost fallacy.

Source: Sensitivity to “sunk costs” in mice, rats, and humans. Science, 2018.