The newly made allotrope closely resembled two jungle gyms, a.k.a. climbing frames, smushed together. | Photo Credit: Public. The Hindu's Science For All newsletter makes science easy and engaging, with weekly stories, insights and discoveries from its science writers. A 3D Carbon Allotrope With Mixed sp–sp³ Hybridization, published in Angewandte Chemie International Edition on September 14, 2026, the team reports a porous, diamond-topology network containing.