Birds have specific needs when it comes to sleep, much of which is influenced by migration patterns.
Australia's native bees have it pretty good at the moment, but it's the European imports that are in danger of colony collapse, which is bad news for Australia - we rely on them for $5 billion worth of free agriculture production.
Humans have had a complex relationship with animals - we use them for food, we keep them as pets, we breed them in zoos and experiment on them in labs.
Cell death was always thought of as a random event, but it isn't always the case. We now know that some white blood cells die in a controlled manner and put the components to use through beaded apoptopodia.