joining me today is bryan walsh kebab ryan is. signed the award-winning egocentric blog and has reported for more than 20 countries on science and environmental stories like stars, global warming at extension. he is the founder and editor of technology and science 10 his book is "end times". bryan, welcome, thank you for being with us. >> this book is about existential risks, risks which could illuminate all of humanity or enough of humanity survivors would not be able to rebuild society to what it is now. hence "end times". let's start with the big question. are these the end times? >> certainly feels that way. it feels even more that way than it did when i finished the book and published it in august of last year. with the book that explains that we are in unique period of accidental peril. we have the big national disasters that could always happen, the dinosaurs knocked out by an asteroid and things like that, but what's really changing is that we have new technology that's very powerful and giving us a way to à whether new fo