Make shorter

mammals.json

@@ -17,7 +17,7 @@
             "template_data": {
                 "visible-transition_in": true,
                 "title": "Mammals tour",
-                "window_text": ["Humans are mammals, so are panthers and platypuses. We all descend from a common ancestor that was around during the rise of the dinosaurs, almost 200 million years ago. We have inherited several unique features from this common ancestor, like the ability to suckle our young.", "The mammals fall into five natural groups: the monotremes, the marsupials, and 3 groups of ”placental” mammals.","On the tree, we’ve highlighted these branches in different colours so you know what's coming, but we hope you’ll still find some surprises!"]
+                "window_text": ["Humans are mammals, so are panthers and platypuses: we all suckle our young. Our common ancestor lived during the rise of the dinosaurs, almost 200 million years ago.", "Mammals fall into five natural groups: the monotremes, the marsupials, and 3 groups of ”placental” mammals.","On the tree, we’ve highlighted these branches in different colours so you know what's coming, but we hope you’ll still find some surprises!"]
             }
         },
         {
@@ -39,7 +39,7 @@
             "template_data": {
                 "visible-transition_in": true,
                 "title": "Monotremes",
-                "window_text": ["The platypus and the echidnas are together known as monotremes. Monotremes are the first of our five groups.", "The handful of species that are found today live exclusively in Australia and New Guinea, and they are the only mammals that have a claim to be truly ”southern”: all fossil species are found in the southern hemisphere. Although like all mammals their babies feed on milk, monotremes do not give birth to live young: they lay eggs instead! Here are some more fun facts about them."],
+                "window_text": ["The platypus and the echidnas are together known as monotremes. Monotremes are the first of our five groups.", "Today they are only found in Australia and New Guinea, and even fossil monotremes all come from the southern hemisphere.", "Although like all mammals their babies feed on milk, monotremes do not give birth to live young: they lay eggs instead! Here are some more fun facts about them."],
                 "media": [
                     "mammals/platypus_fun_facts.jpeg"
                 ]
@@ -51,7 +51,7 @@
             "template_data": {
                 "visible-transition_in": true,
                 "title": "Marsupials",
-                "window_text": ["The next group is the marsupials: around 300 species, including koalas, kangaroos, and wombats. Today they are mainly found in South American and Australia, but compared to the monotremes they are relative newcomers there: their oldest fossils are found in China and North America.","Although marsupials give birth to live young, they lack a true placenta, so the young, called joeys, are born very early (after 10.7 - 38 days, depending on the species).","Newborn joeys are blind, and crawl to their mother's pouch, which acts like an external womb. In the pouch, the tiny joey drinks its mother's milk until it's mature enough to feed for itself."],
+                "window_text": ["The next group is the marsupials: around 300 species, including koalas, kangaroos, and wombats. They are often thought of as Australian, but many come from South America, and China and North America have the oldest marsupial fossils.","Although marsupials give birth to live young, they lack a true placenta, so the young, called joeys, are born very early (after 10.7 - 38 days, depending on the species).","Newborn joeys are blind, and crawl to their mother's pouch, which acts like an external womb. In the pouch, the tiny joey drinks its mother's milk until it's mature enough to feed for itself."],
                 "media": [
                     "https://commons.wikimedia.org/wiki/File:Forester_kangaroo_(Macropus_giganteus_tasmaniensis)_female_with_joey_Esk_Valley_2.jpg"
                 ]
@@ -76,7 +76,7 @@
                 "visible-transition_in": true,
                 "title": "Placental mammals",
                 "window_text": 
-                "The vast majority of mammal species, and all three of our remaining groups, are the placental mammals, the group to which we belong. These mammals have evolved a structure known as the placenta (below): an intricate interface that mediates between the needs of the mother and the demands of the child growing inside her. This allows placental mammals to mature for much longer inside the womb than marsupials.",
+                "The vast majority of mammal species, and all three of our remaining groups, are the placental mammals, the group to which we belong. These mammals have evolved an intricate structure known as the placenta (below), that mediates between the mother and the child growing inside her. This allows their young to mature for much longer inside the womb than marsupials.",
                 "media": [
                     "mammals/placenta.svg"
                 ]
@@ -102,7 +102,7 @@
                 "visible-transition_in": true,
                 "title": "Why three groups?",
                 "window_text": ["Why do the placental mammals fall into 3 natural groups? The clue lies in the timing of this split, which scientists have dated to about a hundred million years ago.",
-                { "visible-active_wait": true, "text": "Around this time, South America, Africa and the Northern hemisphere started to drift apart. Below you can see a map of our planet at that time. It’s thought that each of the three placental mammal groups ended up on a separate landmass (indicated by the arrows), so that they ended up evolving in ”splendid isolation” from each other for tens of millions of years." }],
+                { "visible-active_wait": true, "text": "Around this time, South America, Africa and the Northern hemisphere started to drift apart. Below you can see a map of our planet at that time. It’s thought that each of the three placental mammal groups ended up on a separate landmass (indicated by the arrows), so that they ended up evolving apart for tens of millions of years." }],
                 "media": [
                     { "visible-active_wait": true, "url": "mammals/continents.jpeg" }
                 ]