The world around us is constantly changing, and with these changes come questions that challenge our understanding of life on Earth. One such question is ... Read more The post Are We Entering the ...

But what did they evolve from, are they ‘living fossils’, and how did they survive five mass extinctions? Sharks belong to a group of creatures known as cartilaginous fishes, because most of their ...

Now Keele University boffins say two of these five mass extinctions - 445 million years ago and 372 million years ago - could have been sparked by supernovae in nearby space. A supernova is a ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Violent supernovas ...