1 files changed, 24 insertions, 0 deletions
diff --git a/future.bib b/future.bib
index 996394a..945d245 100644
--- a/future.bib
+++ b/future.bib
@@ -168,3 +168,27 @@ The collective work that produced this book is based on the claim that today’s
   volume    = "",
   url       = "",
 }
+
+@book{ward2003,
+  title     = "Rare Earth: Why Complex Life Is Uncommon in the Universe",
+  author    = "Peter D. Ward and Donald Brownlee",
+  year      = "2003",
+  publisher = "Copernicus Books",
+  isbn      = "0387952896,9780387952895,9780387218489",
+  series    = "",
+  edition   = "",
+  volume    = "",
+  url       = "",
+}
+
+@book{ward2003b,
+  title     = "The life and death of planet Earth: how the new science of astrobiology charts the ultimate fate of our world",
+  author    = "Peter D. Ward and Donald Brownlee",
+  year      = "2003",
+  publisher = "Piatkus",
+  isbn      = "074992425X",
+  series    = "",
+  edition   = "",
+  volume    = "",
+  url       = "",
+}