Oxygen metabolism in descendants of the archaeal-eukaryotic ancestor
Vosseberg, J. et al. The emerging view on the origin and early evolution of eukaryotic cells. Nature 633,…
Snakes Resort to Cannibalism When the Opportunity Strikes, Study Shows
Scientists have uncovered yet another reason not to trust a snake—the slithering creatures have a habit of eating…
Extinct Hawaiian Ibis Had Unusually Small Eyes and Limited Visual Capacity, Study Says
Apteribis, an extinct species of ibis that once inhabited the Hawaiian Islands, occupied a niche similar to that…
Tiny New Species of Herbivorous Dinosaur Unearthed in Spain
A new genus and species of diminutive bipedal dinosaur has been identified from the fossils found in Burgos…
What were the first animals? The fierce sponge–jelly battle that just won’t end
Which animals came first? For more than a century, most evidence suggested that sponges, immobile filter-feeders that lack…
our modern obsession with ‘wellness’ is driven by ancient instincts
If you’ve spent even a little time on social media in recent years, you’ve no doubt come across…
Biomechanical limits of hopping in the hindlimbs of giant extinct kangaroos
Specimens All species included in this study were macropodiforms; the bone measurement dataset encompassed all extant families and…
Southern hemisphere ceratosaurs evolved feeding mechanics paralleling those of Northern hemisphere tyrannosaurids
Carrano, M. T. & Sampson, S. D. The phylogeny of ceratosauria (Dinosauria: Theropoda). J. Syst. Paleontol. 6, 183–236…
We Evolved Something Else Instead
Humans are the only primates that run nearly naked under the sun. Here’s how this biological tradeoff reshaped…
Will mpox go global again? Research shows it’s evolving in curious ways
Mpox virus particles (purple) seem to be spreading more easily between people.Credit: NIAID/SPL As mpox continues to spark…
Oldest known poison arrows show Stone Age humans’ technological talents
Humans have used bows and arrows to hunt for thousands of years, as depicted in this cave painting…
Jellyfish sleep like humans — even though they don’t have brains
The upside-down jellyfish Cassiopea andromeda sleeps for roughly 8 hours a day.Credit: Shahar Shabtai/Alamy Neither jellyfish nor sea…