A central problem for theories of unguided evolution has always been the challenge of building complex biological novelties.
“The case that human language develops step by step through natural selection is weakened by the fact that no single language gene has ever been discovered.”
In “real time” they show the function of an enhancer in switching a gene from off to on.
Scientists researching gene therapy as a potential future therapy have succeeded in restoring feeling to paralyzed rats.
Scientists are delving into the remarkable way a zygote grows through its embryonic stages to an adult.