Adaptation

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com. My parents said the planet is getting too hot for people to live here. They called it climate change. What does that mean? – Joseph, age 12, Boise, Idaho Many countries have seen extremely hot weather lately, but in most of the inhabited world, it’s never going to get “too hot for people to live here,” especially in relatively dry climates. When it’s hot outside in dry places, most of the time our bodies can cool off by evaporating water and heat from our skin as sweat. However, there are places where it occasionally gets dangerously hot and humid, especially where hot deserts are right next to the warm ocean. When the air is humid, sweat doesn’t evaporate as quickly, so sweating doesn’t cool...

Reading down the lengthy final agreement of the COP28 United Nations climate conference held in December 2023, you’ll go a long way before finding a strong, active verb. The lengthy recitation of climate impacts “notes with concern” and occasionally with “significant concern” glaring gaps in countries’ current policies. But while countries volunteered pledges to act, they were less keen to have those pledges framed as binding agreements in the final text. Reactions to COP28’s conclusion have been understandably mixed. Going into the talks, the world was more on track to avert catastrophic warming than it would have been without the 2015 Paris Agreement, but a long way from where it needs to be. Even if all the pledges made at COP28 are implemented, the world will still exceed the Paris goal of keeping global warming under 1.5 degrees Celsius (2.7 Fahrenheit) compared to preindustrial temperatures....

Climate disasters are now costing the United States US$150 billion per year, and the economic harm is rising. The real estate market has been disrupted as home insurance rates skyrocket along with rising wildfire and flood risks in the warming climate. Food prices have gone up with disruptions in agriculture. Health care costs have increased as heat takes a toll. Marginalized and already vulnerable communities that are least financially equipped to recover are being hit the hardest. Despite this growing source of economic volatility, the Federal Reserve – the U.S. central bank that is charged with maintaining economic stability – is not considering the instability of climate change in its monetary policy. Earlier this year, Fed Chair Jerome Powell declared unequivocally: “We are not, and we will not become, a climate policymaker.” Powell’s rationale is that to maintain the Fed’s independence from politics and political cycles, it should use...

Human-driven climate change is increasingly shaping the Earth’s living environments. Rising temperatures, rapid shifts in rainfall and seasonality, and ocean acidification are presenting altered environments to many animal species. How do animals adjust to these new, often extreme, conditions? Animal nervous systems play a central role in both enabling and limiting how they respond to changing climates. Two of my main research interests as a biologist and neuroscientist involve understanding how animals accommodate temperature extremes and identifying the forces that shape the structure and function of animal nervous systems, especially brains. The intersection of these interests led me to explore the effects of climate on nervous systems and how animals will likely respond to rapidly shifting environments. All major functions of the nervous system – sense detection, mental processing and behavior direction – are critical. They allow animals to navigate their e...

Climate change is threatening the survival of plants and animals around the globe as temperatures rise and habitats change. Some species have been able to meet the challenge with rapid evolutionary adaptation and other changes in behavior or physiology. Dark-colored dragonflies are getting paler in order to reduce the amount of heat they absorb from the sun. Mustard plants are flowering earlier to take advantage of earlier snowmelt. Lizards are becoming more cold-tolerant to handle the extreme variability of our new climate. However, scientific studies show that climate change is occurring much faster than species are changing. Zebrafish have evolved to thrive in water a degree or so warmer than normal, but they struggle to survive at higher temperatures. isoft/E+ Getty Images What is evolutionary adaptation? The word “adaptation” is used in many ways by climate scientists, but it has a...