The survival of mammals on Earth after humanity becomes extinct is uncertain and depends on various factors. If humanity were to suddenly become extinct, there would likely be significant changes to the environment and ecosystems, which could have both positive and negative impacts on different species of mammals.
Some mammals, particularly those that have adapted well to human-altered environments, may continue to thrive in areas once dominated by humans. For example, urban-adapted species like rats, mice, and certain scavengers might fare better without human competition and interference.
On the other hand, many mammal species have been negatively impacted by human activities, such as habitat destruction, pollution, and climate change. With the removal of human influence, some ecosystems could begin to recover, providing opportunities for certain mammal populations to rebound.
However, it's important to note that the extinction of humans would not necessarily guarantee the survival of all mammal species. Many mammals are facing threats that extend beyond human activities, such as natural predators, diseases, and changes in climate and environmental conditions.
Additionally, the extinction of humanity wouldn't necessarily eliminate all the anthropogenic changes on Earth. For example, the remnants of human infrastructure and waste could continue to impact certain species and ecosystems even after humans are gone.
In summary, the survival of mammals after humanity becomes extinct is uncertain and would depend on various complex factors. Some species may benefit from the absence of human pressures, while others may continue to face challenges. The fate of mammalian life on Earth will be influenced by both natural and human-induced factors long after humans are gone.