Update README.md

README.md

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  - Cell biology resources, hiPSC lines, plasmids, imaging software, 3D images and models, and more.
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-    <a href="https://www.microns-explorer.orghttps://www.microns-explorer.org/" target="">
+    <a href="https://www.microns-explorer.org/" target="">
 <img height=400 width=400 src="https://alleninstitute.org/wp-content/uploads/2020/10/MICrONS-EM-e1714157281329.jpg"
 		alt="Microns image from the Neural Coding team at the Allen Institute for Brain Science. This image shows colorful renderings of neurons and their synaptic connections."
 	/></a>
-    <a href="https://www.microns-explorer.orghttps://www.microns-explorer.org/" target="">MICrONS Explorer</a>
+    <a href="https://www.microns-explorer.org/" target="">MICrONS Explorer</a>
  - A virtual cortex observatory that includes electron microscopy reconstructions of mouse visual cortex.
 </td>
 </tr>