The viral math problem has X users stumped - but the answer comes from lessons learned in fifth or sixth grade. The best way ...

Warm-Up: Consider a four-letter alphabet A, B, C, I. Here are the target strings: CBI, CCC, and BIAI. Here are the non-target ...

Adsorption on solid surfaces is extremely important for various phenomena and applications. In the 1910s, adsorption and subsequent catalysis was described mainly in terms of diffusion through a fluid ...

Blending hydrogen into existing urban gas networks presents promising pathways for urban decarbonization, yet numerous challenges persist. On this path, Hongfang Lu calls for collaborative action from ...