Four types of discretely assembled mechanical metamaterials. Left to right: Rigid, compliant, auxetic, and chiral. (A) As-molded face parts. (B) Single voxel, front view. (C) A 2 × 2 × 2 cube, front ...

Two papers describing the discovery appear in the current issue of the journal Science. Prior to this, scientists had believed that there were only 21 natural amino acids — the key building blocks of ...

Crashworthiness may be defined as a structure’s ability to provide controlled energy absorption and protect its occupants from excessive forces and peak accelerations in a crash. In general, the ...

This diagram depicts the chemical structure of pyrimidine, a six-membered aromatic ring with two nitrogen atoms at positions 1 and 3 (highlighted in blue). The remaining positions are occupied by ...

The first look at samples returned by the Hayabusa2 spacecraft supports the theory that vital elements for life like amino acids could have been delivered from space. When you purchase through links ...

Earth’s origin story has always had missing pages, from the chemistry of its first crust to the ingredients that seeded life. Now, a series of breakthroughs, from asteroid samples to ancient rocks ...

Uracil, a building block of life, has been found on the asteroid Ryugu. Yasuhiro Oba and colleagues discovered the precursor to life in samples collected from the asteroid and returned to Earth by ...

To gaze at the stars is human. To be able to see them in three-dimensional detail is very nearly divine. “I have spent 17 years studying stars and their titanic explosions. I’ve used dozens of ...

In my two previous columns, I discussed the lower and intermediate levels of the building block approach for crashworthiness testing and analysis of composite structures. I focused on the commercial ...