Newborn megalodon sharks were larger than most adult humans

megalodon shark jaws

“Baby shark” has taken on a whole new meaning. Newborn megalodon sharks were supersized fish larger than most adult humans, a new study suggests. An analysis of the growth rates of the ancient ocean predators, which lived between about 23 million and 2.5 million years ago, estimates that the sharks started life at about 2 […]

Astrocytes eat connections to maintain plasticity in adult brains — ScienceDaily

Developing brains constantly sprout new neuronal connections called synapses as they learn and remember. Important connections — the ones that are repeatedly introduced, such as how to avoid danger — are nurtured and reinforced, while connections deemed unnecessary are pruned away. Adult brains undergo similar pruning, but it was unclear how or why synapses in […]

Astrocytes eat connections to maintain plasticity in adult brains

IMAGE: A 3-D animated image showing our synapse phagocytosis reporter in mouse hippocampus. Presynapses in green, astrocytes in white, and microglia in blue. Phagocytosed presynapses by glia were shown in red…. view more  Credit: KAIST Developing brains constantly sprout new neuronal connections called synapses as they learn and remember. Important connections — the ones that are […]