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Two new electric eel species have been identified in the Amazon basin, including one fish with a record-breaking shock, scientists say. Researchers had previously identified only one species of electric eel in more than 250 years of studying the creatures that lurk in South American waters and stun their prey with electric discharges. However, the new genetic and ecological analysis, published Tuesday in the peer-reviewed Nature Communications, identifies a total of three unique [...]

The finding, from a team led by Daniel Lahr of the University of São Paulo in Brazil, challenges existing theory about life during the time. Known as the latePrecambrianperiod, it was thought to feature only a small number of unicellular lineages, including undifferentiated proto-amoebae and photosynthetic algae known as stromatolites. The new study revealed eight new ancestral lineages of Thecamoebae, the largest group in the amoeba domain. This newly discovered diversity has implications [...]

Astronomers have resolved a long-standing paradox in celestial dynamics. Lauren Fuge reports.