1. The idea of bringing extinct animals back to life, or "de-extinction," has become a topic of growing interest in recent years. With advances in genetic technology and cloning, many believe that resurrecting extinct species could help restore ecosystems and offer valuable scientific insights. However, the idea raises significant debates, especially when considering ethical, ecological, and practical concerns.

2. One argument in favor of de-extinction is that it could help restore ecosystems that have been altered by human activity. For example, the woolly mammoth once played a key role in maintaining the balance of the grasslands by controlling tree and shrub growth. Reintroducing such species might help to restore ecosystems that have been negatively affected by their absence. Additionally, scientists argue that de-extinction could help us understand more about extinct species and their roles in the environment, offering insights into past ecosystems and the causes of their decline.

3. Despite these potential benefits, there are several challenges and risks associated with de-extinction. [I] First, many of the environments in which these species once thrived no longer exist. [II] Even if these animals were successfully revived, there is no guarantee that they would be able to survive in today's different ecosystems. [III] Another concern is that focusing on reviving extinct animals could take attention and resources away from saving species that are still alive but at risk of extinction. [IV] With biodiversity rapidly declining due to habitat destruction, climate change, and human interference, some argue that we should focus on protecting the species we still have, rather than attempting to bring back those that have already vanished.

4. While de-extinction presents exciting possibilities, it is fraught with challenges. Instead of focusing on bringing back extinct species, efforts should prioritize the protection of existing species and ecosystems. This would ensure that the future of our planet's biodiversity remains secure.

1. Extreme habitats are environments where most life, including humans, cannot survive. [I] These areas can be either very cold or very hot. [II] For example, polar regions are extremely cold, with temperatures often falling below 5°C. [III] Despite these harsh conditions, some microbes are able to live and even thrive in these areas. [IV] These bacteria are a type of psychrophile, which are microorganisms that grow best at temperatures of 15°C or lower.

2. On the other hand, some of the most extreme habitats are hot, with temperatures reaching over 40°C. These places are often near geothermal activity, such as deep-sea vents and hot springs. In 1966, microbiologist Thomas Brock discovered that microorganisms were surviving and growing in the hot springs of Yellowstone National Park. These organisms, known as thermophiles, require high temperatures to live. Deserts are also considered extreme hot environments. For example, the sidewinder snake has adapted to survive in the desert by moving in a way that only parts of its body touch the hot sand, reducing its exposure to the heat.

3. Organisms that survive in these extreme conditions can teach scientists important lessons. One example is the wood frog in Alaska (Lithobates sylvaticus). During winter, these frogs freeze completely, but when spring comes, they thaw and continue their lives. Scientists discovered that the frogs create chemicals that protect their organs from ice damage. This finding can help researchers develop methods to extend the preservation of human organs. Such advancements may be crucial for improving organ transplants.

4. Another remarkable organism is the tardigrade, also known as the water bear. This tiny creature can survive in many extreme environments, such as high mountains, deep oceans, and cold Antarctica. The water bear has even survived in space. By studying these organisms, scientists hope to learn more about life on other planets, such as Mars.

1. The 21st-century discoveries about the human brain and its functioning have brought to light the astounding fact that human abilities are not fixed at birth. In other words, what you are able to do with your life is not fixed when you are born. It is not all in the genes. It is not just nature: nurture plays a significant part in the molding of what a person is, and what he/she can be.

2. Brain plasticity or neuroplasticity refers to the amazing ability of the human brain to modify its structure and functions according to the changes within the body and in the external environment. (“Plasticity” comes from the Greek word “plastos” meaning molded).

3. In his book “The Brain that Changes Itself”, psychiatrist and psychoanalyst Norman Doidge, M.D., offers an introduction to the brilliant scientists advocating neuroplasticity and the people whose lives they've transformed. The book describes real life stories of stroke patients learning to speak again and the amazing story of a woman born with half a brain that restructured itself to work as a whole. It is a book that changes the way we think about our brain, its nature, and its potential.

4. [I] The genes we inherit from our parents are finite, no doubt about that. However, our brain's ability to develop is infinite. New brain cells are being born all the time, and to keep them alive and growing, we have to stimulate them. [II] Herein lies the promise of neuroplasticity in the molding of children into adults who are capable of realizing their potential. [III] What Mozart, Einstein and Leonardo da Vinci had was innate potential plus the right environment. [IV]

5. All geniuses started life in exactly the same way. They had parents who supported the development of their individual gifts and talents. They had the right environment and stimuli that led to the optimal development of themselves.

(Adapted from kidsworldfun.com)