Commentary on Some Recent Theses Relevant to Combating Aging: April 2021.

Theses reviewed in this issue include "An Aging Tug of War: The Accumulation of the Spontaneous L-Isoaspartate Modification in Proteins vs. Canonical and Novel Maintenance Pathways," "Cellular and Molecular Mechanisms Underpinning Microglial Activation During Remyelination," "Early Detection of Cancer Metastasis at a Synthetic Pre-Metastatic Niche Using Inverse Spectroscopic Optical Coherence Tomography," "Magnetic Stem Cell Spheroid Microrobots and Their Applications," "Reprogramming Human Endothelium to Hematopoietic Stem Cells with Adaptive Immune Function," and "Scaffold-Free Three-Dimensional Bioprints Repair Small Intestine Injuries and Integrate Into Native Intestine."