Animals communicate with members of their own species and other species. They do this all the time to attract mates, to form social bonds, and to warn off predators. For instance, many male birds use their colorful    41    and feathers to attract female birds. Bees return to the hive to do a wiggling dance   42   shows other bees where the food is located. To scare off predators, some poisonous frogs make use of their brightly colored skin and the blowfish swallow water to expand to twice their   43   . Moreover, male and female mockingbirds copy the calls of other bird species and use complicated songs to attract mates. Baboons groom each other’s fur   44   so as to form close bonds with other members in their group. Amazingly, some animals,   45   mountain lions, use scent from their glands to mark their territories. Despite our advanced technology, we are just beginning to catch a glimpse of how animals really communicate.

Depression drains your energy, hope, and drive, making it difficult to take the steps that will help you to feel better. Sometimes, just thinking about the things you should do to feel better, like exercising or spending time with friends, can seem exhausting or impossible to put into action. It’s the Catch-22 of depression recovery: the things that help the most are the things that are the most difficult to do. There is a big difference, however, between something that’s difficult and something that’s impossible. While recovering from depression isn’t quick or easy, you do have more control than you realize—even if your depression is severe and stubbornly persistent. The key is to start small and build from there. You may not have much energy, but by drawing on all your reserves, you should have enough to take a walk around the block or pick up the phone to call a loved one, for example. Taking the first step is always the hardest. But going for a walk or getting up and dancing to your favorite music, for example, is something you can do right now. And it can substantially boost your mood and energy for several hours—long enough to put a second recovery step into action, such as preparing a mood-boosting meal or arranging to meet an old friend.