Here is an article asking if we (mankind) are ready to say good-bye to 10 critically endangered species of animals. Our reckless activities have put these 10 species on the verge of extinction.
About 400 years ago, mankind had a significant impact on a flightless bird called the dodo. Now all we can do is imagine what it would like to see the animal, how it behaved and how it sounded all because none of them exist anymore.
After mankind wipes out the above 10 species, unless we change our behavior, others will surely follow suit leaving future generations wondering what it would be like to see those animals in person rather than watching through videos on Youtube, other video sharing websites, documentaries or even going to the museum to look at exhibits.