Study: Nearby exoplanets likely lag Earth in evolution

A study in the International Journal of Astrobiology assessed cumulative photosynthesis on 29 potentially habitable exoplanets. TRAPPIST-1e may hold only 21 percent of Earth's fixed carbon and likely remains at the microbial stage, while only GJ 1061c and K2-3d may have evolved further.

• Researchers examined 29 exoplanets, including TRAPPIST-1e 40 light-years away
• TRAPPIST-1e may have just 21 percent of Earth's fixed carbon
• Three worlds might host Mesozoic-like conditions
• Only GJ 1061c and K2-3d may be ahead of Earth's timeline