LifeWe're beginning to question the idea of species – including our ownAre you a human, or a human-Neanderthal hybrid? The concept of the species, one of the most basic in biology, may not be as well-defined as we thinkFeatures
LifeFossil of a newly-discovered mammal shows it had bizarre ears A rodent-like creature that lived 120 million years ago in Asia had an unusual ear shape that may have evolved to accommodate its unique way of chewing ¿ìè¶ÌÊÓÆµ