A new map of the thickness of Mars’ crust shows less variation between thicker regions (red) and thinner regions (blue), compared to earlier mapping. This view is centered on Valles Marineris, with the Tharsis Montes near the terminator to its west. The map is based on modeling of the Red Planet’s gravity field by scientists at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. The team found that globally Mars’ crust is less dense, on average, than previously thought, which implies smaller variations in crustal thickness. Credit: NASA/Goddard/UMBC/MIT/E. Mazarico

DREAM analysis in CR animals. a Unsupervised hierarchical clustering analysis of methylation values in all genomic regions. The green to red scale indicates the methylation percentage. The color codes for age and caloric status are shown on the left. b DNA methylation in AL old animals vs. CR old animals. Average DNA methylation level of each CpG site in CR old individuals (x axis), methylation in AL old individuals is shown on the y axis. The red and green dots represent CpG sites within CGI and non-CGI, respectively. The full range (0–100%) of methylation level is shown on the left and the low range (0–20%) is magnified and shown on the right. c Correlation between the effects of CR and age-related methylation drift in AL animals...

Trajectories and turning points characterise brain age. (a) Percentage of TTTPs at each age of human lifespan. Mean age is 26.0 years for males and 27.5 years for females. (b) Percentage of TTTPs at each age of human lifespan using three different methods for fitting splines. Mean age is 31.3 years using cubic splines with 3 degrees of freedom, 21.6 years using cubic splines with 4 degrees of freedom and 25.2 years using Loess regression. (c) Percentage of TTTPs at each age of mouse. Mean age is 156 days for males and 165 days for females. (d) Cumulative sum of TTTP scores for every year of life in the Braincloud dataset. (e) Cumulative sum of TTTP scores for every year of life in the mouse hippocampus dataset...

Plants like the Jewelweed (Impatiens capensis; or commonly, spotted touch-me-not) use stress ingeniously for the ballistic dispersal of their seeds. The plant stores energy in its seed pods in the form of inbuilt stresses by controlling tissue hydration. When gently touched, these pods explode and curl up to launch their seeds. Using a similar concept, S. Sundaram and coworkers demonstrate the use of 3D-printing to fabricate flat electronic composites with residual stress in specific regions. Credit: Massachusetts Institute of Technology