The number of phytoliths do not increase until centuries later. (newscientist.com)
Serrallonga pictured the first humans doing the same with their hand axes, reckoning that the stone tools would show up in the archaeological record, but not the wood, as it would all degrade over time — except for microscopic particles of silica called phytoliths. (sciencemag.org)
Henry studies glasslike particles, known as phytoliths, from plants eaten by hominins and sealed in their teeth tartar. (discovermagazine.com)