How does a plant know the time to flower? A new study describes a process involving genes, sunlight sensors, switches, clocks, feedback loops and messages.
Finch beaks loom large in classical Darwinian theory, but two examples of mouth parts in very different animals show that dramatic variations can be achieved quickly without the slow and gradual accumulation of small changes Darwin envisaged.
Botulinum toxin (botox) is now big business in health and fashion, but few may remember it derives from one of the deadliest substances known in nature. Other examples show that some forms of "natural evil" can be seen in a different light.