Arabian Sea humpback whales have, at some point during their evolutionary history, adapted to living hyper-locally within the confines of the Arabian Sea. Now, researchers monitored their dives using satellite tags which allowed them to track their movement across the Arabian Sea. The results showed most whales are homebodies – moving within a narrow latitudinal band spanning just a few hundred kilometers. Just one whale broke the pattern and travelled across the Arabian Sea. This is the first direct evidence of a long-distance journey made by an Arabian Sea humpback whale. The team said better understanding of these whales’ movement could provide important insights for the endangered species’ conservation.

For a long time, scientists have thought that four-legged land animals (tetrapods) evolved from amphibian-like creatures that grew up from tadpoles. But scientists have now found fossilized baby early tetrapods, which skipped the tadpole metamorphosis scientists had expected to see. The finding means that the first land-dwelling vertebrates were less like modern amphibians than had previously been thought— upending scientists’ understanding of how animals conquered the land.

The experiences we face early in life may leave their marks on our health in ways that echo across decades—and even across the entire body.

A new study examined a unique group of free-living, rhesus macaques who have been followed their entire lives to document their experiences. Pairing these histories with genomic data from 12 tissues collected in adulthood, the study provides some of the clearest molecular evidence yet that early life adversity leaves a lasting, system-wide impression at the epigenome, the biological layer on top of the human genome that regulates gene activity.

Spatial profiling of muscle-invasive bladder cancer reveals how different tumor cell states are organized within individual tumors

Bladder tumors are not simply “luminal” (more differentiated) or “basal” (less differentiated) but often contain both cell states arranged in distinct spatial patterns

Luminal tumor cores and basal-like invasive regions respond differently to treatments

Findings provide a framework that may inform precision therapy strategies tailored to the spatial tumor cell landscape of bladder cancer