Studies show that the effects of climate change can already be seen in Amazonian fish, which are growing smaller and less abundant in wetlands and streams; female fish are also reproducing at a younger age.
Understanding how quickly the location range of a species of trees can migrate in response to climate change is important, but it's also important to consider how different genetic adaptations may be able to travel between populations of a given tree species.
Overconsumption, overpopulation, and uncertainty about the future are top concerns of people who say climate change is affecting their decision whether or not to have children, a survey finds.
Reproduction is a fundamental feature of life on earth, but a morally fraught decision for anyone who has the choice. And there's not even a right answer.
