Until decades ago, our visions of the future were largely positive. We thought science and technology would cure all the ills of humanity, leading to lives of fulfillment and opportunity for all. However, as we have gained a deeper appreciation of the range of threats facing us, from epidemic (流行病) flu to climate change, we might even tend to assume that humanity has little future to look forward to.

Yet such depression is misplaced. The fossil record shows that many species have existed for millions of years — so why shouldn’t we? Take a look at our species in the universe, and it becomes clear we have an excellent chance of surviving for tens of thousands of years. Look up Homo sapiens (智人) in the “Red List” of threatened species of the International Union for the Conversation of Nature (IUCN), and you will read: “Listed as Least Concern because the species is widely distributed, adaptable, currently increasing, and there are no major threats resulting in an overall population decline.”

So what does our deep future hold? Many researchers and organizations are now thinking seriously about the question. The potential evolution of today’s technology is complicated, so it’s perhaps best left to science fiction writers and futurologists to explore the possibilities of the bright future.

Our future is quite rosy because it shows many promising possibilities of achievement. Besides, we are now knowledgeable enough to reduce risks that threatened the existence of earlier humans and to improve those to come. Take a longer view and we can say with considerable assurance that the past holds the key to the future: by analyzing the past, we can make evidence-based forecasts about the situations in which our descendants (后代) will find themselves.

Many of us live with a roommate at some stage. Sometimes, there can be problems. Who hasn’t had an argument about whose turn it is to take out the rubbish or who should be the one to clear up after dinner? However, living with another person also comes with many benefits.

You know that there’s always someone else around, which can help you feel safer. There is always someone to talk to so you never feel lonely. Besides these obvious benefits, there are some you may not notice. For example, we’re actually more likely to eat healthier food when living with others.

To examine the effect of living alone, Australian university researchers did much research and found that people living alone tended to eat less fresh food, which can have a significant negative effect on long-term health. However, those living with others generally benefited from a more varied diet compared to those living alone.

What could explain these findings? The researchers believe the social and cultural roles played by cooking, food preparation and eating may be important considerations. For example, those living with friends have someone else to go shopping with, and thus they are likely to buy higher- quality fresh food regularly.

Cooking skills may be another factor. If people living alone find they do not have the knowledge required to prepare a particular dish or cook a certain food, they may fall back on ready-made，less healthy food. However, if they live with at least one other person, they may be able to ask for help.

In addition, people living alone can eat whatever they want at any time of the day or night. However, it’s helpful to have someone around who questions your decision to eat frozen pizza at 3 am. In other words, roommates can draw your attention to unhealthy routines.