Add release 18 and R2DT paper to the timeline

rnacentral/portal/templates/portal/about.html

@@ -794,7 +794,49 @@ About RNAcentral
                     },
                     "text": {
                         "headline": "Release 17",
-                        "text": "RNAcentral now includes piRBase as well as updated RNAse P diagrams <br> <a href='{{ blog_url }}'>Release announcement</a>"
+                        "text": "RNAcentral now includes piRBase as well as updated RNAse P diagrams <br> <a href='https://blog.rnacentral.org/2021/03/rnacentral-release-17.html'>Release announcement</a>"
+                    }
+                },
+                {
+                    "media": {
+                        "url": "{% static "img/timeline/r2dt-paper.png" %}",
+                        "caption": "Paper in Nature Communications",
+                        "credit": "Nature Communications"
+                    },
+                    "start_date": {
+                        "month": "06",
+                        "day": "09",
+                        "year": "2021"
+                    },
+                    "end_date": {
+                        "month": "06",
+                        "day": "09",
+                        "year": "2021"
+                    },
+                    "text": {
+                        "headline": "New paper is out in Nature Communications",
+                        "text": "A <a href='https://www.nature.com/articles/s41467-021-23555-5'>paper describing R2DT</a>, a new method for RNA secondary structure visualisation, has been published in Nature Communications."
+                    }
+                },
+                {
+                    "media": {
+                        "url": "{% static "img/timeline/release-v18.png" %}",
+                        "caption": "Release 18 features",
+                        "credit": "RNAcentral"
+                    },
+                    "start_date": {
+                        "month": "06",
+                        "day": "25",
+                        "year": "2021"
+                    },
+                    "end_date": {
+                        "month": "06",
+                        "day": "25",
+                        "year": "2021"
+                    },
+                    "text": {
+                        "headline": "Release 18",
+                        "text": "RNAcentral includes an updated rRNA classification and >22 million RNA secondary structures <br> <a href='{{ blog_url }}'>Release announcement</a>"
                     }
                 },
             ]