A 1707 engraving of sperm cells seen under a microscope by Antonie van Leeuwenhoek,who was the first to observe them | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Biophoto Associates |
Bildgröße: | 6000 px × 2100 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
|